Which of these statements is true? O If P(A) = 1 and P(B| A) = 0, then P( B) = 1. O If P(A) = 1 and P(B| A) = 1, then P( B) = 1. O If P(A) = 0 and P(B| A) = 0, then P(B) = 0. O If P(A) = 0 and P(B| A) = 1, then P( B) = 0