请教一道GWD题中定语从句和伴随的区别

A study by the Ocean Wildlife Campaign urged states to undertake a number of remedies to reverse a decline in the shark population, which includes the establishment of size limits for shark catches, closing state waters for shark fishing during pupping season, and requiring commercial fishers to have federal shark permits.

(A ) which includes the establishment of size limits for shark catches, closing

(B ) which includes establishing limits to the size of sharks that can be caught, closing

(C ) which include the establishment of size limits for shark catches, the closing of

(D ) including establishing size limits for shark catches, closing

(E ) including the establishing of limits to the size of sharks that are caught, the closing of

答案是D，对称结构很容易看出来，只是我一直想知道这里能不能用which结构，答案上写，b错是因为includes错了，那如果改成include就对了吗？

所以谁能解释下定语从句和伴随的区别呀。。。。拜托了，这是个大问题啊。。。