The Results of Axsom and Cooper's Weight-Reduction Experiment Showed That

The results of Axsom and Cooper's weight-reduction experiment showed that by the end of the fifth (and last) session, subjects in the high-effort condition had lost ________ weight than those in the low-effort condition. A year later, subjects in the high-effort condition had lost ________ weight than those in the low-effort condition.

A) significantly more; significantly more
B) significantly more; about the same amount of
C) slightly less; significantly more
D) slightly more; significantly more