"except" or "but except"

I wonder we should use "except" or "but except".

For example, in OG16

Mauritius was a British colony for almost 200 years, excepting for the domains of administration and teaching, the English language was never really spoken on the island.

(A) excepting for
(B) except in
(C) but except in
(D) but excepting for
(E) with the exception of

The answer is C

However, in Gmatclub free test

The university library offers most of the resources Ronald will need; except for Spanish translations of certain books, which he will have to request from a neighboring university.
(A)need; except for Spanish translations of certain books, which he
(B)need, except for Spanish translations of certain books, which he
(C)need, accept for Spanish translations of certain books, which he
(D)need, with the exception of certain Spanish translations of books which he
(E)need, but there are few books in Spanish which he

Answer is B >> why the answer of this one is not A ?

Thank you in advance!