Wholly vs. quite

[Nua]

Test No. incompl/inter-39 "Yes, Yes, Yes", question 1

I am sure you made the right choice and I ......... support your decision.

(a) fairly
(b) quite
(c) considerably
(d) wholly

Test No. incompl/inter-39 "Yes, Yes, Yes", answer 1

I am sure you made the right choice and I wholly support your decision.

Correct answer: (d) wholly

Your answer was: incorrect
I am sure you made the right choice and I quite support your decision.
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Could you please explain to me why "wholly" is the correct answer?

[Torsten]

If you think that somebody has made the right decision you should support them wholly or totally.
Quite means rather or to a certain extent which doesn't fit here.
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