An AND gate has 7 inputs, what is the only input word that produces a 1 output? A. 0 B. 1111 C. 1110000 D. 1111111 E. None of the above

The other options are incorrect because they do not have all 1s in their input.

Option A, 0, has 0s in all of its inputs, so it will always produce a 0 output.

Option B, 1111, has 1s in all of its inputs except for the first input, so it will only produce a 1 output if the first input is also 1.

Option C, 1110000, has 1s in all of its inputs except for the first and second inputs, so it will only produce a 1 output if the first and second inputs are also 1.

Option E, None of the above, is incorrect because there is at least one input word that produces a 1 output, namely 1111111.