【请教】一道GWD语法 GWD26-Q38

38. GWD26-Q38

Finally reaching a decision on an issue that has longbeen politically charged in the Pacific Northwest,politicians decided to postpone by at least five years an ambitious plan toprotect wild salmon and other endangered fish, instead of which they proposed aseries of smaller steps, by which they intend to protect the fish.

A.   politicians decided to postpone by at leastfive years an ambitious plan to protect wild salmon and other endangered fish,instead of which they proposed a series of smaller steps, by which they intend

B.   politiciansdecided to postpone by at least five years an ambitious plan to protect wildsalmon and other endangered fish, proposing instead a series of smaller stepsintended

C.   politicians decided to postpone by atleast five years an ambitious plan for protecting wild salmon and otherendangered fish, and instead they proposed a series of smaller steps,intending.

D.   an ambitious plan to protect wild salmon andother endangered fish was postponed by politicians, who instead proposed aseries of smaller steps, intending.

E.    an ambitious plan to protect wild salmon andother endangered fish has been postponed by politicians, proposing instead aseries of smaller steps intended.