being allowed/having been allowed

[joham]

--What makes him so excited?
--__________ to join the club.

A. Being allowed B. Having been allowed

The given answer is B.
We can also say 'Being allowed to join the club makes him excited', can't we?'
If we can, is there any difference between them?
Thank you in advance.

[Barb_D]

I'd say it's a better answer. "Being allowed" serves as a noun, a better answer to "what" than "having been allowed."

Having been allowed to join the club, he was so happy even a casual observer could see it. -- that works.