The results of the company's cost-cutting measures are evident in its profits, which increased five percent during the first three months of this year after it fell over the last two years.

(A) which increased five percent during the first three months of this year after it fell
(B) which had increased five percent during the first three months of this year after it had fallen
(C) which have increased five percent during the first three months of this year after falling
(D) with a five percent increase during the first three months of this year after falling
(E) with a five percent increase during the first three months of this year after having fallen
OA is c
what is the best approach to use here so as to get the correct answer? Can anyone help me out on this?
Thanks for your prompt response