The series of surveys revealed that the company had enjoyed success more
due to the fact that its customers felt limited in their purchasing options than having brand loyaltyA
due to the fact that its customers felt limited in their purchasing options than
having[
who have?] brand loyalty
Wrong. - due to the fact is not correct.
- Structure is not parallel
- Who have brand loyalty?
B
due to its customers feeling limited in their purchasing options
than to having brand loyalty
Wrong.- Not parallel. [due to X than to Y] is wrong idiom.
C because its customers felt limited in their purchasing options than
that they have brand loyalty
Wrong.- "That" refers to what?
D because its customers felt limited in their purchasing options than because they had brand loyalty
Correct.E because of its customers feeling limited in their purchasing options than
because of their having brand loyalty
Wrong. Awkward.