Question

Let A, B and C be three events. Which choice corresponds to the event that exactly one of these events occurs?
a. (A∪B∪C)'
b. (AB'C') ∪ (A'BC') ∪ (A'B'C)
c. (AB) ∪ (AC) ∪ (BC)
d. A∪B∪C
e. (AB'C') ∪ (A'BC') ∪ (A'B'C) ∪ (A'B'C')