39. (26509-!-item-!-188;#058&002648) The Sports Medicine Programs of the Olympic Training Center, a complex where final tryouts are held for athletes representing the United States in the Olympics, is geared toward enhancing athletes' performance and toward their preparation for international competition. (A) is geared toward enhancing athletes' performance and toward their preparation (B) is geared to enhance the performance of athletes and to prepare them (C) are geared to enhance athletes' performance and their preparation (D) are geared toward the enhancement of athletes' performance and toward preparing them (E) are geared toward enhancing the performance of athletes and preparing them
C为什么不对 performance 和preparation平行, 作enhance的宾语不可以吗?
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