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generis
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There are only 2 viable options : A and B.

"A career" is singular so we use does not. Had it been plural, we would have used do not.

I would , however, love to see a more comprehensive response.

IMO B.
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A career in the medical profession, which requires an enormous investment of time and money, do not guarantee success as there is so much competition.

Subject : A career requires a verb which should be ' requires'

which is a relative pronoun that incorrect modifies medical profession and not a career.
a career does not guarantee success as there is so much competition.

choice (D): requires an enormous investment of time and money, and it cannot guarantee success because there is so much competition

Now a career has a verb 'requires'
It correctly refers to a career
do not is removed and cannot is used instead which corrects the agreement error in other choices.
The sentence is logical and uses proper grammar to convey meaning.

IMHO D
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A career in the medical profession, which requires an enormous investment of time and money, do not guarantee success as there is so much competition.

(A) which requires an enormous investment of time and money, do not guarantee success as there is so much competition - Which is an ambiguous term here

(B) which requires an enormous investment of time and money, does not guarantee success since there is so much competition -Which is an ambiguous term here

(C) requiring an enormous investment of time and money, without guarantee because there is so much competition- not a SV agreement, sp ruled out.

(D) requires an enormous investment of time and money, and it cannot guarantee success because there is so much competition- Singular so matching SV agreement and it here refers to career on which we have invested time and money.

(E) requires that an enormous investment of time and money be made and success cannot be guaranteed due to the competition - Requires that is incorrect
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A career in the medical profession, which requires an enormous investment of time and money, do not guarantee success as there is so much competition.

(A) which requires an enormous investment of time and money, do not guarantee success as there is so much competition

Which refers to profession, not the career

(B) which requires an enormous investment of time and money, does not guarantee success since there is so much competition

Same as a

(C) requiring an enormous investment of time and money, without guarantee because there is so much competition

No verb

(D) requires an enormous investment of time and money, and it cannot guarantee success because there is so much competition

Correct

(E) requires that an enormous investment of time and money be made and success cannot be guaranteed due to the competition

Be made is incorrect

IMO D

Posted from my mobile device
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generis

Project SC Butler: Day 145: Sentence Correction (SC2)


For SC butler Questions Click Here

A career in the medical profession, which requires an enormous investment of time and money, do not guarantee success as there is so much competition.

(A) which requires an enormous investment of time and money, do not guarantee success as there is so much competition

(B) which requires an enormous investment of time and money, does not guarantee success since there is so much competition

(C) requiring an enormous investment of time and money, without guarantee because there is so much competition

(D) requires an enormous investment of time and money, and it cannot guarantee success because there is so much competition

(E) requires that an enormous investment of time and money be made and success cannot be guaranteed due to the competition

(A) which requires an enormous investment of time and money, do not guarantee success as there is so much competition - Requires "Does not" for the subject "career"

(B) which requires an enormous investment of time and money, does not guarantee success since there is so much competition - Correct

(C) requiring an enormous investment of time and money, without guarantee because there is so much competition - Changes the meaning - to there are two career in medical profession of which one requires an enormous investment

(D) requires an enormous investment of time and money, and it cannot guarantee success because there is so much competition - What does "it refer to?

(E) requires that an enormous investment of time and money be made and success cannot be guaranteed due to the competition - A career requires money be made - Incorrect
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A career in the medical profession, which requires an enormous investment of time and money, do not guarantee success as there is so much competition.

(A) which requires an enormous investment of time and money, do not guarantee success as there is so much competition SVA mistake

(B) which requires an enormous investment of time and money, does not guarantee success since there is so much competition - correct answer

(C) requiring an enormous investment of time and money, without guarantee because there is so much competition - SVA - no verb for the subject career

(D) requires an enormous investment of time and money, and it cannot guarantee success because there is so much competition - double pronoun mistake

(E) requires that an enormous investment of time and money be made and success cannot be guaranteed due to the competition - no needs for comma before requires
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IMO correct option is B

A career in the medical profession, which requires an enormous investment of time and money, do not guarantee success as there is so much competition.

(A) which requires an enormous investment of time and money, do not guarantee success as there is so much competition - This option is incorrect on the basis of SVA error - the subject if the sentence is singular "A career in the medical profession", should agree with a singular verb "does" not "do" - Incorrect.

(B) which requires an enormous investment of time and money, does not guarantee success since there is so much competition - Corrects the SVA error in the above option; ",which requires an enormous investment of time and money," correctly modifies the preceding noun phrase "A career in the medical profession" - Correct

(C) requiring an enormous investment of time and money, without guarantee because there is so much competition - Verb+ing modifier when used after comma, this participle modifies the entire preceding clause, but before comma, in this sentence there is no complete clause present, only a noun phrase "A career in the medical profession". Thus - Incorrect

(D) requires an enormous investment of time and money, and it cannot guarantee success because there is so much competition - Lets go by the meaning here & discard the option straight away "A career in the medical profession requires an enormous investment of time and money?????" does it makes sense?? a career requires investment of money & time? or the students who opt for this career option require those?? - Illogical meaning - Incorrect

(E) requires that an enormous investment of time and money be made and success cannot be guaranteed due to the competition - Same error introduced as D & also passive usage is somehow not a favorable option here - Incorrect
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A career in the medical profession, which requires an enormous investment of time and money, do not guarantee success as there is so much competition.

(A) which requires an enormous investment of time and money, do not guarantee success as there is so much competition
A career do not guarantee success , does is used for referring the third entity which is singular
I do this , we do this (correct)
career do this (wrong), career does this (correct)

(B) which requires an enormous investment of time and money, does not guarantee success since there is so much competition
does - is the correct form, since is correctly used to explain the reason

(C) requiring an enormous investment of time and money, without guarantee because there is so much competition
A career , requiring lot of investment, without guarantee because ... there is no action or verb in the first part, so sentence appears disconnect

(D) requires an enormous investment of time and money, and it cannot guarantee success because there is so much competition
career requires lot of investment and it cannot guarantee success because... does 'it' point to profession or career.. also this sentence makes it mandatory about career needing lot of investment which is not intended meaning

(E) requires that an enormous investment of time and money be made and success cannot be guaranteed due to the competition
here also it suggests career demands lot of investment to be made. success cannot be guaranteed as a separate element in the list, no more has the connection with career
and use of due to is wrong to specify the reason..

B is the answer!
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I have posted the official explanation HERE.
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generis

Project SC Butler: Day 145: Sentence Correction (SC2)


For SC butler Questions Click Here

A career in the medical profession, which requires an enormous investment of time and money, do not guarantee success as there is so much competition.

(A) which requires an enormous investment of time and money, do not guarantee success as there is so much competition

(B) which requires an enormous investment of time and money, does not guarantee success since there is so much competition

(C) requiring an enormous investment of time and money, without guarantee because there is so much competition

(D) requires an enormous investment of time and money, and it cannot guarantee success because there is so much competition

(E) requires that an enormous investment of time and money be made and success cannot be guaranteed due to the competition

Source: Dominate the GMAT


I eliminated A, C and E.
A - Career is singular...So Career do not guarantee is not correct. It should be Career does not guarantee.
C - Incomplete sentence.....Career requiring....without guarantee because.....
E - requires that seems incorrect. somewhat changes the meaning of the sentence too.

D - no need of comma in between a career in medical profession, requires...It is referring to what ????? It may refer to investment or career....Career is too far from it.
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generis

Project SC Butler: Day 145: Sentence Correction (SC2)


For SC butler Questions Click Here

A career in the medical profession, which requires an enormous investment of time and money, do not guarantee success as there is so much competition.

(A) which requires an enormous investment of time and money, do not guarantee success as there is so much competition

(B) which requires an enormous investment of time and money, does not guarantee success since there is so much competition

(C) requiring an enormous investment of time and money, without guarantee because there is so much competition

(D) requires an enormous investment of time and money, and it cannot guarantee success because there is so much competition

(E) requires that an enormous investment of time and money be made and success cannot be guaranteed due to the competition

Source: Dominate the GMAT

Will option D be correct had there been no comma before requires.

A career in the medical profession requires an enormous investment of time and money, and it cannot guarantee success because there is so much competition
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