If P(A∣B)=P(A∣Bc)P(A|B) = P(A|B^c)P(A∣B)=P(A∣Bc), which of the following is true?
A,BA, BA,B are independent
P(A)=0P(A) = 0P(A)=0
A,BA, BA,B are mutually exclusive
P(B)=1P(B) = 1P(B)=1