Sentence Correction

10. A large rise in the number of housing starts in the coming year should boost new construction dollars by several billion dollars, making the construction industry’s economic health much more robust than five years ago.
(A) making the construction industry’s economic health much more robust than five years ago
(B) and make the construction industry’s economic health much more robust than five years ago
(C) making the construction industry’s economic health much more robust than it was five years ago
(D) to make the construction industry’s economic health much more robust than five years ago
(E) in making the construction industry’s economic health much more robust than it as five years ago


I got the answer right, but was not able to identify which category this question falls into - Is it pronoun reference? or something else.

This is a comparison question

Ans should be C

another vote for C. comparison because of word "than"

ok..now i see it... thanks a lot!

C...C for Comparison...