Hearing loss is sometimes called

[BTGmoderatorDC]

Hearing loss is sometimes called a loss of intimacy because the more hearing ability declines, the ability to pick out a voice over background noise is one of the first things to go.

(A) because the more hearing ability declines
(B) as hearing ability declines
(C) because as hearing ability declines
(D) because hearing ability declines as
(E) because when hearing abilities declines

What is wrong with other Options?

OA C

[Risfy1994]

Oh, it is such an interesting question, but I am completely confused with the right answer.. Hope, someone will help us here!