What is quantum advantage?

Question: What does quantum advantage generally mean? A) A quantum device solves a meaningful task better than the best known classical approach under defined conditions B) A quantum computer replaces all classical computers C) A qubit is always faster than a bit D) Measurement no longer produces randomness Correct: A Explanation: Quantum advantage means that a quantum method demonstrates better performance than classical methods for a specific task under clear assumptions or constraints. Topic: quantum computing / quantum advantage