Which statement about a NAND gate is correct?

A NAND gate, which stands for "Not AND," performs the opposite function of an AND gate. This means that the output of a NAND gate is low (0) only when all of its inputs are high (1).

In the case where all inputs are 1, it can be summarized that the output is indeed 0, which is consistent with the behavior of a NAND gate. This highlights the defining characteristic of the NAND operation: it negates the result of the AND operation. Therefore, when the input conditions are exactly as stated (all inputs being 1), the output will be 0.

In contrast, the other statements either misrepresent the behavior of the NAND gate or provide conditions that do not align properly with NAND logic. For instance, if all inputs are 0, the output is 1, which is true, but it is not the best illustrative choice for understanding the fundamental operation of the NAND gate in this instance compared to the correct choice.