30. The Sports Medicine Programs of the Olympic Training Center, a complex where final try outs are held for athletes representing the US 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(由于其前面有两个复数名词，The sports Medicine Programs和athletes，到底这个代词指代的是哪个名词？？？？？？）请指教
A: is 应该改复数，toward 后面不平行
B: is 应该改复数
C: enhance their preparation 不合逻辑
D: and前后不平行
E: correct | 
