The correct answer is C. AND.
An AND gate is a digital logic gate that implements logical conjunction. In other words, it produces a high output (1) only if all of its inputs are high (1).
An OR gate is a digital logic gate that implements logical disjunction. In other words, it produces a high output (1) if any of its inputs are high (1).
A NAND gate is a digital logic gate that implements logical negation followed by logical AND. In other words, it produces a high output (1) only if all of its inputs are low (0).
A NOR gate is a digital logic gate that implements logical negation followed by logical OR. In other words, it produces a high output (1) only if all of its inputs are low (0).
The question is asking for a gate that has two or more input signals and produces a high output only if all of the inputs are high. The only gate that meets this criteria is the AND gate.