What is fault-tolerant quantum computing?

Question: What is fault-tolerant quantum computing? A) Quantum computing that ignores all errors B) Quantum computing performed only on simulators C) Quantum computing using error-corrected logical qubits so computations can continue reliably despite physical errors D) Quantum computing without gates Correct: C Explanation: Fault-tolerant quantum computing uses error correction and protected logical qubits so that long computations can be performed reliably even when physical components are imperfect. Topic: quantum computing / fault tolerance / error correction