Select the correct option to test your answer: A The current in an ac circuit flows in one direction, but changes value periodically B The current in an ac circuit flows in one direction at a steady level C The current in an ac circuit changes direction periodically D The current in an ac circuit flows in two directions at the same time E. None of the above Correct Answer: Option C (The current in an ac circuit changes direction periodically) Verified correct option for Computer Science Engineering (Electronic Principles).