Sentence Correction

An experiment in a recent nephrological study of glomerulonephritis demonstrated that, in the presence of macrophage stimulating factor (M-CSF), macrophages proliferated almost so rapidly in the glomerulus, and even more rapidly in the tubulointerstitium, as in the absence of M-CSF.

A. almost so rapidly in the glomerulus, and even more rapidly in the tubulointerstitium, as
B. almost as rapidly in the glomerulus, and even more rapidly in the tubulointerstitium than
C. in the glomerulus almost as rapidly as, and in the tubulointerstitium even more rapidly than
D. almost as rapidly as in the glomerulus, and even more rapidly in the tubulointerstitium, than what they did
E. in the glomerulus almost so rapidly, and in the tubulointerstitium even more rapidly than what they did

OA C

Source: Economist Gmat