Question

Let Ω be the sample space and A⊆Ω be an event. Given below are two statements
(s1) : If P(A) = 0, then A = ϕ
(s2) : If P(A) = 1, then A = Ω
Then

A. both (S1) and (S2) are true
B. only (S1) is true
C. only (S2) is true
D. both (S1) and (S2) are false