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) ⊃ (A ⊃ X)

C[(X ⊃ Z) ⊃ B] ⊃ Y

D[(A · X) ⊃ Y] · (A ⊃ X)

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