Why is quantum error correction important?

Question: Why is quantum error correction important? A) Quantum states are fragile and physical qubits are noisy B) It makes measurement unnecessary C) It removes the need for algorithms D) It allows perfect copying of unknown states Correct: A Explanation: Quantum hardware is affected by noise, decoherence, and gate errors. Quantum error correction aims to protect logical quantum information by encoding it across multiple physical qubits. Topic: quantum computing / error correction