What does superposition allow?

Question: What does superposition allow a qubit to do? A) Store only the value 0 B) Avoid measurement forever C) Copy itself perfectly D) Exist as a combination of |0⟩ and |1⟩ before measurement Correct: D Explanation: Superposition allows a qubit to be represented as a combination of |0⟩ and |1⟩. When measured, the qubit gives one classical result according to its probability amplitudes. Topic: quantum computing / superposition