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Official Explanation

Answer: D
The opening clause in this sentence is a modifier; what follows the comma must be what is modified. What is "hunted by poachers?" That's the Black Rhinoceros, so the Black Rhinoceros must follow the comma. (C), (D) or (E) must be correct. In (C), the sentence should be complete even without the interpolated phrase "killed for...." However, "Black Rhinoceros and were reduced so heavily in number..." is not a complete sentence. (D) isn't the most attractive grammatical construction, but "were killed" and "were reduced" are parallel. Choice (E) is wrong because the word "so" is misplaced. Compare "reduced so heavily in number that one of the subspecies was declared extinct" in (D) with "reduced heavily in number so that one of their subspecies..." in (E). The correct idiom to express the effects of a change like this one is "so...that," not "so that." Choice (D) is correct.

Hope this helps. :lol:
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sanjeebpanda
Mike Thanks for nice explanation.
(E) Black Rhinoceros were killed for the decorative and purported medicinal value of their rhino horns and reduced heavily in number so that one of their

Split #2: missing verb mistake. In (C) - (E), after the initial modifier, "the Black Rhinoceros" is the subject. We could have
[subject][verb] "and" [verb]

Whats do you mean by this.E is incorrect as because it has were killed and reduced heavily? Should it be were killed and were reduced heavily?
Thanks in advance.
Dear sanjeebpanda,
The verb structure in (E) is perfectly fine. As I explain above, in split #2 about possible missing verbs, choice (E) is perfectly acceptable.

The problem with (E), the reason it can't be the answer, is explained in split #3, the placement of the word "so." Does all this make sense?

Mike :-)
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avohden
Hunted by poachers throughout the 20th century, they killed Black Rhinoceros for the decorative and purported medicinal value of rhino horns and they were reduced heavily in number so that one subspecies was recently declared extinct.

(A) they killed Black Rhinoceros for the decorative and purported medicinal value of rhino horns and they were reduced heavily in number so that one

(B) they killed Black Rhinoceros, whose horns had decorative and purported medicinal value, and were reduced heavily in numbers so that one of their

(C) Black Rhinoceros, killed for the decorative and purported medicinal value of their horns, and were reduced so heavily in number that one

(D) Black Rhinoceros were killed for the decorative and purported medicinal value of their horns and were reduced so heavily in number that one

(E) Black Rhinoceros were killed for the decorative and purported medicinal value of their rhino horns and reduced heavily in number so that one of their


GH-05.30.13 - OE to follow
Dear avohden,
I'm happy to help with this. :-)

Split #1 the misplaced modifier.
The part of the sentence before the underlined section, "Hunted by poachers throughout the 20th century" is a modifier that obviously refers to the rhinos, so it must touch the words "Black Rhinoceros", in accordance with the Modifier Touch Rule. For more on this, see:
https://magoosh.com/gmat/2013/modifiers- ... orrection/
When that modifier touches "they" (the poachers), it illogical suggests that poachers were hunting poachers. This is not what the sentence is trying to say. Choices (A) & (B) make this classic mistake, and are completely unacceptable.

Split #2: missing verb mistake. In (C) - (E), after the initial modifier, "the Black Rhinoceros" is the subject. We could have
[subject][verb] "and" [verb] = two verbs in parallel, perfectly correct. This is what (D) & (E) have.
but the structure
[subject][participial phrase] "and" [verb] = incorrect. We could say this is a parallelism mistake, and ultimately the problem is a "missing verb" --- for more on this mistake, see:
https://gmat.magoosh.com/lessons/914-the ... rb-mistake
Choice (C) makes this mistake and must be incorrect.

Split #3: the idiom of consequence.
For more on the idioms of cause & consequence, see:
https://magoosh.com/gmat/2013/gmat-idiom ... nsequence/
At the very end of the underlined section, we have two choices:
(1) "were reduced so heavily in number that one" = this is logically and idiomatically correct.
(2) "were reduced heavily in numbers so that one" = this is awkward and rhetorically much weaker --- it doesn't establish the logical chain of connection quite as clearly. Choices (B) & (E) use this --- in fact, both of these have "so that one of their", using the plural pronoun for the singular subject, another classical grammar mistake. Choices (B) & (E) are complete unacceptable.

The only answer that comes through all these splits on the correct side is (D), the best possible answer for this question.

Does all this make sense?
Mike :-)
Thanks for the wonderful explanation Mike.
but i was wondering use of 2nd were is necessary in option D or it is fine without it.

(D) Black Rhinoceros were killed for the decorative and purported medicinal value of their horns and were reduced so heavily in number that one
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