Fossils found recently in Pakistan provide evidence supporting the theory of land mammals returning to the water that later evolved into modern whales.

A. supporting the theory of land mammals returning to the water that later

B. supporting the theory that land mammals, after returning to the water,

C. that supports the theory of land mammals that returned to the water and that later

D. in support of the theory that land mammals returned to the water and that they later

E. of support for the theory of land mammals that returned to the water and after



I managed to narrow it down to B and D and was stuck after that.. some help pls..

OA is B

Source: Kaplan