Committee \(X\) has \(4\) members, committee \(Y\) has \(5\) members, and these committees have no members in common. If

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Committee \(X\) has \(4\) members, committee \(Y\) has \(5\) members, and these committees have no members in common. If a task force is to be formed consisting of one member of \(X\) and one member of \(Y,\) how many different task forces are possible?

A) 6
B) 9
C) 10
D) 20
E) 36

Answer: D

Source: GMAT Prep