What is the purpose of Grover's algorithm?

Question: What is Grover's algorithm mainly known for? A) Factoring integers exponentially faster B) Simulating only classical circuits C) Removing all hardware noise D) Searching an unstructured space with quadratic speedup Correct: D Explanation: Grover's algorithm searches an unstructured search space using approximately O(√N) queries instead of O(N) classical brute-force search. Topic: quantum computing / Grover's algorithm