referring you post from link:
like-vs-as-t1517.html

"You can say "Joan sings like her mother," meaning, "Joan sings in the same way as her mother does." Don't let yourself get trapped by the semantic argument too much: "am I comparing Joan's mother with Joan, or am I comparing the way Joan's mother SINGS with the way Joan sings?" In fact, you're arguably doing more of the latter, but just as Stacey says, you can often construct the sentence EITHER with "like" OR with "as." The bigger issue is structural: first of all, never put a tensed verb after "like." For instance, never say "Joan sings like her mother sings." Secondly, if you use "like," try to put it as close as possible to the noun you're doing the comparison with, so that you avoid ambiguity ("Joe has a cat like Mary."). This second point leads you to put "like" constructions near the front of sentences on the GMAT, since you're often doing a comparison with the subject"

Unfortunately, With this suggestion I got my answers more wrong than correct.The latest one was:
5.Like many of his contemporaries did, Bob Dylan wrote songs that became anthems for a generation of antiwar activists.
B)Bob Dylan wrote songs like many of his contemporaries
C)As did many of his contemporaries, Bob Dylan wrote songs

I was confused with choice B and C.and as per above advice I opted for B(because of more straight choice and because of the above advice).But I found that the correct answer C.
Can anyone please clarify if I am missing something here from the given post while applying that same logic here.

This could be wrong, but here're my thoughts:

1) The original sentence is wrong because "like" should only be used to compare nouns/subjects and not entire clauses as attempted in this sentence.

2) Choice "B" is wrong because it muddles the meaning of the sentence. The phrase that starts with "that" is supposed to modify "songs" and not "contemporaries" - it's a bit awkward.

3) Choice "C" is correct because "as" is used to compare clauses and it is clear what songs Bob Dylan actually wrote.

Hope this helps...