Which of the following statements is correct?

Question $3$ options:

a$)$

Taxpayers are entitled to an additional standard deduction if they are at least age $65.$

b$)$

Taxpayers are entitled to an additional standard deduction if they are blind.

c$)$

Taxpayers are entitled to an additional standard deduction if they are deaf.

d$)$

Answers a$.$ and b$.$ are both correct.

e$)$

Answers a$.,$ b$.,$ and c$.$ are all correct.