请教OG12-SC133

同问。把题目也贴上来

133. Last week local shrimpers held a news conference to take some credit for the resurgence of the rare Kemp’s ridley turtle, saying that their compliance with laws requiring that turtle-excluder devices be on shrimp nets protect adult sea turtles.
(A) requiring that turtle-excluder devices be on shrimp nets protect
(B) requiring turtle-excluder devices on shrimp nets is protecting
(C) that require turtle-excluder devices on shrimp nets protect
(D) to require turtle-excluder devices on shrimp nets are protecting
(E) to require turtle-excluder devices on shrimp nets is protecting
答案是选(B)，不太明白OG中对(D)选项的解释“To require obscures the urpose of the laws"

这里怎么区别requiring和to require?请NN们指教

TKS~~明白点啦~~