Hello Shraddha,I agree with your explanation in answer choice D.But I somehow feel that the comma before evidenced is unncecessary. It is the use of irony which is evidenced in the slow revelation.......So comma is not required I think. Putting a comma before evindenced suggests that the part after comma modifies the part before comma which I feel is incorrect.
This is the correct answer choice D:
Many of Guy de Maupassant's short stories have become classics because of the author's famed and masterful use of irony, evidenced in the slow revelation of a tragic twist of fate at the end of each piece.
There are a few things that I would like to say here:
1. "evidenced" is a verb-ed modifier that always modifies the preceding noun enity. Here usage of "evidenced" is correct because it logically refers to "use of irony", the preceding noun entity.
2. Use of comma alone is not a deterministic issue to reject an otherwise correct answer choice. In this particular case, usage of comma pertains more to the stylistic issue and not to the grammar issue. Here the comma has been used to imtroduce that necessary pause in the sentence to understand the meaning of the sentence better. This comma makes you pause and then you continue reading, understanding the role of "evidenced...". Never reject an answer choice because of the use of comma in a certain fashion.
Hope this helps.
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