If A and B are true statements and X, Y and Z are false statements, determine which one of the following is true.

A[A⊃(X·Y)]⊃[(A⊃X)∨(A⊃Y)]

B[(A·X)⊃B]⊃(A⊃X)

C[(X⊃Z)⊃B]⊃Y

D[(A·X)⊃Y]⊃(A⊃X)

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