First Q is from GmatPrep and the second Q is from Gmat Paper Test Code 42. How come B is incorrect in Q1, but similar rules (for 'it') seem to work fine for Q2.
Q1. There are hopeful signs that we are shifting away from our heavy reliance on fossil fuels: more than ten times as much energy is generated through wind power now than it was in 1990.
A) generated through wind power now than it was
B) generated through wind power now as it was
C) generated through wind power now as was the case
D) now generated through wind power as it was
E) now generated through wind power than was the case
OA is C, Why not B or D.
[second question redacted - NOTE TO POSTER: the ets paper tests, in addition to being rather outdated, are also banned sources on this forum]