Sentence Correction

@Takshs,
I totally second harshavardhan. BTG is a forum where we expect people to follow some norms and rules before posting.
The way u posted here is definitely not commendable.
FYI, all of us here know the answer has to be A and there is a modifier issue but we are trying to deal with other kinds of minor errors that also play a pivotal role. knowing other approaches help in the long run.

If you cant add value to discussions , I dont want you to be belittling the discussion.