E7A07 (D)
What logical operation does a NAND gate perform?
A. It produces a 0 at its output only if all inputs are 0
B. It produces a 1 at its output only if all inputs are 1
C. It produces a 0 at its output if some but not all inputs are 1
D. It produces a 0 at its output only if all inputs are 1
