In Boolean algebra if A=B=1 then value of A.B+A is A, B, A+B,B.A+A --- more than one choice?

This question was asked by Chinkoo in my nudge book. so i am posting its solution.

Solving by boolean algebra,

A.B + A = 1.1 + 1 = 1 + 1 = 1

(a) A = 1, correct option

(b) B = 1, correct option

(c) A + B = 1 + 1 = 1, correct option

(d) B.A + A = 1.1 + 1 = 1 + 1 = 1, correct option

So, all the four choices are correct.