Given those answer options, answer the question: You are presented with the quiz "Completing a circuit causes fan's blades to what?" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "completing a circuit causes electricity to flow through that circuit" and "electricity flows through an electric motor in a fan, causing the fan's blades to turn". So, what's the best answer to the question?
A:
turn