Gilbert is a $78-$year$-$old man who resides in an LTC facility. He was very sociable and friendly when he first came to the facility. However, Gilbert is hard of hearing and his hearing loss has accelerated during the last two years. This has resulted in a change in Gilbert$$s personality. He is now withdrawn, seemingly depressed, and downright ornery. Which statement or statements is$/$are true regarding Gilbert$$s situation? $($Level $2)$

Group of answer choices

a$.$ Gilbert has sensory deprivation.

b$.$ Gilbert's withdrawal and unsocial attitude is considered a secondary disability.

c$.$ Gilbert's secondary disability cannot be reversed.

d$.$ a and c

e$.$ b and c

f$.$ a and b

All of the above

None of the above.