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KrishnanTN
Analysis - Repetition itself means again and again. So using both together is redundant.

A. the repetition of a specific action again and again until it is
REJECTED - 'Repetition' and 'again and again' used in the same sentence - redundant.

B. specific actions until they are
REJECTED - The underlined portion emphasis 'Repeating actions'. That is not mentioned in this option. So rejected.

C. the repetition of a specific action until that action has been
REJECTED - While there is nothing specifically wrong here - a pronoun could have been used to refer to the action, instead of repeating it.

D. the repetition of a specific action until it is
RIGHT ANSWER - This is the right usage of repetition, without using 'again and again'.

E. repeating a specific action again and again until it is
REJECTED - 'Repetition' and 'again and again' used in the same sentence - redundant.


In D, "it" can also refer to the "learning process", since both "learning process" and "action" are singular. C removes this ambiguity.
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Can anyone please explain why (have been), in option D is correct.
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KrishnanTN
Analysis - Repetition itself means again and again. So using both together is redundant.

A. the repetition of a specific action again and again until it is
REJECTED - 'Repetition' and 'again and again' used in the same sentence - redundant.

B. specific actions until they are
REJECTED - The underlined portion emphasis 'Repeating actions'. That is not mentioned in this option. So rejected.

C. the repetition of a specific action until that action has been
REJECTED - While there is nothing specifically wrong here - a pronoun could have been used to refer to the action, instead of repeating it.

D. the repetition of a specific action until it is
RIGHT ANSWER - This is the right usage of repetition, without using 'again and again'.

E. repeating a specific action again and again until it is
REJECTED - 'Repetition' and 'again and again' used in the same sentence - redundant.

In B they also ambiguous. Right?
What about perfect tense in C.
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nikhilvarekar
KrishnanTN
Analysis - Repetition itself means again and again. So using both together is redundant.

A. the repetition of a specific action again and again until it is
REJECTED - 'Repetition' and 'again and again' used in the same sentence - redundant.

B. specific actions until they are
REJECTED - The underlined portion emphasis 'Repeating actions'. That is not mentioned in this option. So rejected.

C. the repetition of a specific action until that action has been
REJECTED - While there is nothing specifically wrong here - a pronoun could have been used to refer to the action, instead of repeating it.

D. the repetition of a specific action until it is
RIGHT ANSWER - This is the right usage of repetition, without using 'again and again'.

E. repeating a specific action again and again until it is
REJECTED - 'Repetition' and 'again and again' used in the same sentence - redundant.


In D, "it" can also refer to the "learning process", since both "learning process" and "action" are singular. C removes this ambiguity.


I agree with Nikhil. Option C removes thsi ambiguity.
DmitryFarber GMATNinja Bunuel - CAN YOU PLEASE CLARIFY THIS POINT?
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Niveditha28

There's no real ambiguity here. Any reasonable reader should know that we're not going to master "the learning process" itself by repeating one action. Having said that, it is never incorrect to repeat a noun, even when a pronoun can be used clearly. So the only way we could really disqualify either C or D would be to say that the tense is wrong. However, "has been" and "is" don't really create divergent meanings in this context, so I'm tempted (as I so often am) to throw the whole question out. Unofficial SC questions are really a minefield.
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