Sentence Correction

According to a study done by the International Health, Racquet, and Sportsclub Association, 12 percent of gym members join in the month of January, a time when people make New Year’s resolutions.

(A) 12 percent of gym members join in the month of January, a time when people make New Year’s resolutions
(B) 12 percent of gym members, at a time when people make New Year’s resolutions, join in the month of January
(C) during a time when people make New Year’s resolutions, 12 percent of gym members join in the month of January
(D) 12 percent of gym members join in the month of January, it is a time when people make New Year’s resolutions
(E) when people make New Year’s resolutions, 12 percent of gym members join in the month of January


OA A

Source: EMPOWERgmat

this is a good example of sentence correction question where meaning is important.no option other than a and d carry the same intended meaning and D is wrong because its wordy there is no need ot write "it is a time". comma already modifies the time.