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Re: Less than 35 years after the release of African honeybees outside Sao [#permalink]
Less than 35 years after the release of African honeybees outside Sao Paulo, Brazil, their descendents, popularly known as killer bees, had migrated as far north as Southern Texas.


(A) Less than 35 years after the release of African honeybees outside Sao Paulo, Brazil,

The past time interval that is modified by “less” clearly states the period of time we are talking about and does so without the redundant “In” that is present in the other options. Additionally the use of past perfect is accurate because in addition to using it for an earlier event in the past (when a later event is also present), past perfect is used to describe events that were completed by a certain time in the past and this is exactly what the sentence does. To make it easier to see, saying “By 1995, their descendants had migrated” is better than saying “By 1995, the descendants migrated”. Simplifying the sentence- Less than 35 years after the release of AH, their descendants had migrated. No issues with this one, hang on to it!

(B) In less than 35 years since releasing African honeybees outside Sao Paulo, Brazil,
“In” and “less” are redundant here because the time period in the past is already modified by less than. Also, this sentence uses releasing to modify the descendants and says that the descendants released the bees- Illogical. Eliminate.

(C) In less than the 35 years since African honeybees had been released outside Sao Paulo, Brazil,
Same issue as B regarding “in” and “less” being redundant. Also, the use of had been is ugly here, A does a much better job of describing the event. Eliminate.

(D) It took less than 35 years from the release of African honeybees outside Sao Paulo, Brazil, when
Oh boy, this one looks ugly. First, the it has no referent. It doesn’t logically refer to anything here as there is no delayed subject (it would be correct in a sentence like “it is probable that Joan will ace her exam tomorrow” - it correctly refers to Joan acing here exam and can be written as - “That Joan will ace her exam tomorrow is likely”)
Also, the sentence incorrectly states that their descendants had migrated during the release of the honeybees which is clearly not the intent.

(E) It took less than the 35 years after the time that African honeybees were released outside Sao Paulo, Brazil, and then
“Than the 35 years” can be better phrased as just “less than 35 years”. The “It” issue persists the same way as it does in D. Additionally, the use of “and then” makes 35 years after release of honeybees and the migration of their descendants seem to be totally separate events; essentially, there is follow up for what happened in less than 35 years after the release.
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Re: Less than 35 years after the release of African honeybees outside Sao [#permalink]
How can the past perfect "had migrated" stand alone? This is ungrammatical
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Re: Less than 35 years after the release of African honeybees outside Sao [#permalink]
All explanations here fails to account for the use of past prefect tense. There is no comparable event in the sentence to support that use. As such the sentence itself is illogical.
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Re: Less than 35 years after the release of African honeybees outside Sao [#permalink]
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henrykwok wrote:
All explanations here fails to account for the use of past prefect tense. There is no comparable event in the sentence to support that use. As such the sentence itself is illogical.


Hello henrykwok,

We hope this finds you well.

To answer your query, the phrase "Less than 35 years after the release of African honeybees" means "before 35 years elapsed since the release of African Honeybees"; the other past action in this sentence is the action of 35 years elapsing.

We hope this helps.
All the best!
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Re: Less than 35 years after the release of African honeybees outside Sao [#permalink]
ExpertsGlobal5 wrote:
Dear Friends,

Here is a detailed explanation to this question-
sandipchowdhury wrote:
Less than 35 years after the release of African honeybees outside Sao Paulo, Brazil, their descendents, popularly known as killer bees, had migrated as far north as Southern Texas.


(A) Less than 35 years after the release of African honeybees outside Sao Paulo, Brazil,

(B) In less than 35 years since releasing African honeybees outside Sao Paulo, Brazil,

(C) In less than the 35 years since African honeybees had been released outside Sao Paulo, Brazil,

(D) It took less than 35 years from the release of African honeybees outside Sao Paulo, Brazil, when

(E) It took less than the 35 years after the time that African honeybees were released outside Sao Paulo, Brazil, and then


Meaning is crucial to solving this problem:
Understanding the intended meaning is key to solving this question; the intended core meaning of this sentence is that less than 35 years after African honeybees were released outside Sao Paulo, the bees' descendants had migrated as far north as southern Texas.

Concepts tested here: Meaning + Modifiers + Pronouns + Awkwardness/Redundancy

A: Correct. This answer choice uses the phrase "Less than 35 years after the release of African honeybees outside Sao Paulo" to modify the clause "their descendants...had migrated as far north as Southern Texas", less than 35 years after African honeybees were released, by someone else, outside Sao Paulo, the bees' descendants had migrated as far north as southern Texas. Further, Option A avoids the pronoun error seen in Options D and E, as it uses no pronouns. Additionally, Option A is free from awkwardness and redundancy.

B: Trap. This answer choice alters the meaning of this sentence through the phrase "less than 35 years since releasing"; the construction of this phrase incorrectly modifies "their descendants", incorrectly implying that the African honeybees released their descendants outside Sao Paulo; the intended meaning is that someone else released the African honeybees outside Sao Paulo. Additionally, Option B uses the needlessly wordy phrase "In less than", leading to awkwardness and redundancy; this usage is redundant, as "In" can be deleted without a loss of clarity.

C: Trap. This answer choice redundantly uses the past perfect tense verb "had been released" alongside the word "since"; remember, when the chronology is clear because of terms such as "before/after/when/earlier/later"…or because of clear mention of dates, use past perfect tense is not required, though not incorrect either. Further, Option C uses the needlessly wordy phrase "In less than the", leading to further awkwardness and redundancy.

D: This answer choice alters the meaning of the sentence through the phrases "It took less than" and "when their descendants...Texas"; the construction of these phrases incorrectly implies that the descendants of African honeybees had migrated as far north as Southern Texas, at the same time as the release of African honeybees outside Sao Paulo, and some unspecified event occurred less than 35 years later; the intended meaning is that less than 35 years after African honeybees were released outside Sao Paulo, the bees' descendants had migrated as far north as southern Texas. Further, Option D suffers from a pronoun error, as the pronoun "It" lacks a clear referent.

E: This answer choice alters the meaning of the sentence through the phrases "It took less than" and "and then their descendants...Texas"; the construction of these phrases incorrectly implies that some unspecified event took place less than 35 years after African honeybees were released outside Sao Paulo, Brazil, and after that event, the bees' descendants had migrated as far north as Southern Texas. Further, Option E suffers from a pronoun error, as the pronoun "It" lacks a clear referent. Additionally, Option E redundantly uses the past perfect tense verb "had been released" alongside the word "then"; remember, when the chronology is clear because of terms such as "before/after/when/earlier/later"…or because of clear mention of dates, use past perfect tense is not required, though not incorrect either. Besides, Option E uses the needlessly wordy phrase "after the time that African honeybees were released", leading to further awkwardness.

Hence, A is the best answer choice.

All the best!
Experts' Global Team


For what you said for option C, Does it applicable for Present Perfect Tense? or is it just limited to Past Perfect Tense?

Thank You!
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Re: Less than 35 years after the release of African honeybees outside Sao [#permalink]
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hxalghfr wrote:
ExpertsGlobal5 wrote:
Dear Friends,

Here is a detailed explanation to this question-
sandipchowdhury wrote:
Less than 35 years after the release of African honeybees outside Sao Paulo, Brazil, their descendents, popularly known as killer bees, had migrated as far north as Southern Texas.


(A) Less than 35 years after the release of African honeybees outside Sao Paulo, Brazil,

(B) In less than 35 years since releasing African honeybees outside Sao Paulo, Brazil,

(C) In less than the 35 years since African honeybees had been released outside Sao Paulo, Brazil,

(D) It took less than 35 years from the release of African honeybees outside Sao Paulo, Brazil, when

(E) It took less than the 35 years after the time that African honeybees were released outside Sao Paulo, Brazil, and then


Meaning is crucial to solving this problem:
Understanding the intended meaning is key to solving this question; the intended core meaning of this sentence is that less than 35 years after African honeybees were released outside Sao Paulo, the bees' descendants had migrated as far north as southern Texas.

Concepts tested here: Meaning + Modifiers + Pronouns + Awkwardness/Redundancy

A: Correct. This answer choice uses the phrase "Less than 35 years after the release of African honeybees outside Sao Paulo" to modify the clause "their descendants...had migrated as far north as Southern Texas", less than 35 years after African honeybees were released, by someone else, outside Sao Paulo, the bees' descendants had migrated as far north as southern Texas. Further, Option A avoids the pronoun error seen in Options D and E, as it uses no pronouns. Additionally, Option A is free from awkwardness and redundancy.

B: Trap. This answer choice alters the meaning of this sentence through the phrase "less than 35 years since releasing"; the construction of this phrase incorrectly modifies "their descendants", incorrectly implying that the African honeybees released their descendants outside Sao Paulo; the intended meaning is that someone else released the African honeybees outside Sao Paulo. Additionally, Option B uses the needlessly wordy phrase "In less than", leading to awkwardness and redundancy; this usage is redundant, as "In" can be deleted without a loss of clarity.

C: Trap. This answer choice redundantly uses the past perfect tense verb "had been released" alongside the word "since"; remember, when the chronology is clear because of terms such as "before/after/when/earlier/later"…or because of clear mention of dates, use past perfect tense is not required, though not incorrect either. Further, Option C uses the needlessly wordy phrase "In less than the", leading to further awkwardness and redundancy.

D: This answer choice alters the meaning of the sentence through the phrases "It took less than" and "when their descendants...Texas"; the construction of these phrases incorrectly implies that the descendants of African honeybees had migrated as far north as Southern Texas, at the same time as the release of African honeybees outside Sao Paulo, and some unspecified event occurred less than 35 years later; the intended meaning is that less than 35 years after African honeybees were released outside Sao Paulo, the bees' descendants had migrated as far north as southern Texas. Further, Option D suffers from a pronoun error, as the pronoun "It" lacks a clear referent.

E: This answer choice alters the meaning of the sentence through the phrases "It took less than" and "and then their descendants...Texas"; the construction of these phrases incorrectly implies that some unspecified event took place less than 35 years after African honeybees were released outside Sao Paulo, Brazil, and after that event, the bees' descendants had migrated as far north as Southern Texas. Further, Option E suffers from a pronoun error, as the pronoun "It" lacks a clear referent. Additionally, Option E redundantly uses the past perfect tense verb "had been released" alongside the word "then"; remember, when the chronology is clear because of terms such as "before/after/when/earlier/later"…or because of clear mention of dates, use past perfect tense is not required, though not incorrect either. Besides, Option E uses the needlessly wordy phrase "after the time that African honeybees were released", leading to further awkwardness.

Hence, A is the best answer choice.

All the best!
Experts' Global Team


For what you said for option C, Does it applicable for Present Perfect Tense? or is it just limited to Past Perfect Tense?

Thank You!


Hello hxalghfr,

We hope this finds you well.

To answer your query, no; this rule is not applicable to the present perfect tense, as the present perfect tense is not used to refer to the order of events.

We hope this helps.
All the best!
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Re: Less than 35 years after the release of African honeybees outside Sao [#permalink]
Hard one . For a particular reason I thought their can not refer to :OF african honeybees".
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Re: Less than 35 years after the release of African honeybees outside Sao [#permalink]
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GMATNinja avigutman KarishmaB is the use of past perfect in the since clause correct and what should follow in the main clause? If not , pls explain your reason and also pls tell in general context as well as in context of Choice C

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Re: Less than 35 years after the release of African honeybees outside Sao [#permalink]
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I am confused about use of the pronoun 'their' in the second part of the sentence. I know it logically refers to African bees but in first part of the sentence African bees have 'of' proposition in front of it and i have read somewhere pronouns can not refer to apostrophes or noun with proposition 'of' before them. sorry if it is a very stupid question.
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Re: Less than 35 years after the release of African honeybees outside Sao [#permalink]
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thakurrani81 wrote:
I am confused about use of the pronoun 'their' in the second part of the sentence. I know it logically refers to African bees but in first part of the sentence African bees have 'of' proposition in front of it and i have read somewhere pronouns can not refer to apostrophes or noun with proposition 'of' before them. sorry if it is a very stupid question.


Hello thakurrani81,

We hope this finds you well.

To clarify, there is no such rule that pronouns cannot refer to nouns that are part of prepositional phrases.

Further, while the use of a subject pronoun to refer to a possessive noun (a noun with the apostrophe "s") was once considered incorrect on GMAT, this rule has since been relaxed.

We hope this helps.
All the best!
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Re: Less than 35 years after the release of African honeybees outside Sao [#permalink]
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thakurrani81 wrote:
I am confused about use of the pronoun 'their' in the second part of the sentence. I know it logically refers to African bees but in first part of the sentence African bees have 'of' proposition in front of it and i have read somewhere pronouns can not refer to apostrophes or noun with proposition 'of' before them. sorry if it is a very stupid question.


Not a stupid question at all. Pronoun rules are the squishiest of all SC rules. Antecedents are kind of the wild west--there are few firm rules about where an antecedent can be. As ExpertsGlobal mentioned, even one of the old firmer rules, that a subjective pronoun, such as 'he' or 'it', cannot replace a the noun referenced in a possessive word, such as "Reed's" or "the dog's," doesn't seem to hold true any longer.

Below is a video on pronouns that might help you, but just know that these are maybe my least favorite 'big' SC things to deal with because of the seeming flexibility they have.

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Less than 35 years after the release of African honeybees outside Sao [#permalink]
Less than 35 years after the release of African honeybees outside Sao Paulo, Brazil, their descendants, popularly known as killer bees, had migrated as far north as Southern Texas.

The sequence of events - the release of African honeybees outside Sao Paulo > descendants migrated as far as Southern Texas > less than 35 years (Look at it: by the time we reached, say, 34 years, the descendants had migrated)

(A) Less than 35 years after the release of African honeybees outside Sao Paulo, Brazil, - ok

(B) In less than 35 years since releasing African honeybees outside Sao Paulo, Brazil, - "ING modifier" releasing - who? "their descendants" - wrong.

(C) In less than the 35 years since African honeybees had been released outside Sao Paulo, Brazil, - "the" can be dropped before "35 years. "had been released" by whom? There is nothing wrong in using "since" with past perfect. E.g., He had been studying diligently since he had enrolled in the course. As the non-underlined part has the past perfect, and the timing is already taken care of by "In less than the 35 years," there is no strong reason to use "had been released." it is better to use the past here, "was released." Nonetheless, in option elimination, we can't change options :), so cross it off as inferior to A.

(D) It took less than 35 years from the release of African honeybees outside Sao Paulo, Brazil, when - It took less than 35 years... blah blah...., when....blah blah..., then what? As anairamitch1804 pointed out, we need something to follow it, such as "It took less than 35 years, when the economy had fully recovered, for the housing market to stabilize." Also, does It mean that " the release ...." and "the migration" happened simultaneously? - wrong sequence.

(E) It took less than the 35 years after the time that African honeybees were released outside Sao Paulo, Brazil, and then - "the" can be dropped before "35 years. "then" then what? Also, there is no reason to use "then" when the past perfect already clears the sequence.
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