Question

Given (A = 3,5,7,9,11), (B = 7,9,11,13), (C = 15,17), find (A cap (B ∪ C)).
a) (7,9,11)
b) (3,5,7,9,11,13)
c) (7,9,11,15,17)
d) (3,5,7,9,11)