Why is the inverse QFT used in QPE?

Question: Why is the inverse Quantum Fourier Transform applied in Quantum Phase Estimation? A) To convert phase information encoded in amplitudes into a measurable computational-basis bitstring B) To remove all entanglement from the circuit permanently C) To make every gate classical D) To reset all qubits to |0⟩ Correct: A Explanation: Controlled powers of the unitary encode phase information into the counting register. The inverse QFT converts that phase pattern into a binary approximation that can be measured. Topic: quantum computing / QPE / inverse QFT