The recent amendments to the rules governing professional baseball, like those governing professional gymnastics, were motivated by a desire to make the sport more interesting to watch.

A) those governing professional gymnastics, were motivated
B) those to the rules governing professional gymnastics, were motivated
C) those to the rules which govern professional gymnastics, were motivated
D) the amendments to the rules governing professional gymnastics, have been motivated
E) the amendments governing professional gymnastics, were being motivated

What is wrong with Option D? I somehow find it the best Option.

OA B