The gyrfalcon, an Arctic bird of prey, has survived a close brush with extinction; its numbers are now five times greater than when the use of DDT was sharply restricted in the early 1970s.
A. extinction; its numbers are now five times greater than
B. extinction; its numbers are now five times more than
C. extinction, their numbers now fivefold what they were
D. extinction, now with fivefold the numbers they had
E. extinction, now with numbers five times greater than

OA is A. What is wrong with E. I have read that comma+with modifies the previous clause and this kind of modification appears logical to me. Why is it incorrect