P(a) = 0.3 P(b|a) = 1.0 P(b|~a) = 0.5 P(c|a) = 0.4 P(c|~a) = 0.9 P(d|b,c) = 0.4 P(d|b,~c) = 0.9 P(d|~b,c) = 0.3 P(d|~b,~c) = 0.5 Clustered graph is: (A+B) -> C (A+B) -> D C -> D