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Question 1: Determine the values of A, B, C, and D that make the sum term equal to zero.
A = 1, B = 0, C = 0, D = 0
A = 1, B = 0, C = 1, D = 0
A = 0, B = 1, C = 0, D = 0
A = 1, B = 0, C = 1, D = 1