GMAT Sentence Correction (SC) | The typical size difference between males and females

The typical size difference between males and females has lessened since the origins of the human species becausethe size increase in males has been slight while the size increase in females has been great.

(A)the size increase in males has been slight while the size increase in females has been great

(B)the male size increase has been slight and because it has been great in females

(C)the size increase had been slight for males but great for females

(D)of the size increase being slight
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