Dear friends, could you explain why in the following unit the best answer is E. I chose D.
I recent years cattle breeders have increasingly used crossbreeding, in part that their steers should acquire certan characteristics
and partly because crossbreeding is said to provide hybrid vigor.
a) the same
b) in part for the acquisition of certain characteristics
c) partly because of their steers acquiring certain characteristics
d) partly because certain characteristics should be acquired by their steers
e) partly to acquire certain characteristics in their steers