Sentence Correction

Finally reaching a decision on an issue that has long been politically charged
in the Pacific Northwest, politicians decided to postpone by at least five 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 to
protect the fish.
A. politicians decided to postpone by at least five 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. politicians decided to postpone by at least five years an ambitious plan
to protect wild salmon and other endangered fish, proposing instead a
series of smaller steps intended.
C. politicians decided to postpone by at least five years an ambitious plan
for protecting wild salmon and other endangered fish, and instead they
proposed a series of smaller steps, intending.
D. an ambitious plan to protect wild salmon and other endangered fish was
postponed by politicians, who instead proposed a series of smaller
steps, intending.
E. an ambitious plan to protect wild salmon and other endangered fish has
been postponed by politicians, proposing instead a series of smaller
steps intended.