What is an ansatz in variational quantum algorithms?

Question: What is an ansatz in a variational quantum algorithm? A) A parameterized quantum circuit used to prepare candidate states B) A classical password for accessing a quantum computer C) A fixed measurement result D) A type of hardware noise only Correct: A Explanation: An ansatz is a parameterized circuit chosen to represent possible solution states. During optimization, the parameters are adjusted so the circuit produces a state that better solves the target problem. Topic: quantum computing / ansatz / VQE