If P(A)=0.5P(A) = 0.5P(A)=0.5 and P(B∣A)=0.2P(B|A) = 0.2P(B∣A)=0.2, what is the smallest possible value for P(A∪B)P(A \cup B)P(A∪B)?
0.1
0.5
0.6
0.7