DC Voltage Sources Have a Positive (+) Terminal and a Negative

Multiple Choice

DC voltage sources have a positive (+) terminal and a negative (-) terminal. Which of the following statements explains why AC voltage sources do not have positive and negative terminals?

A) AC voltage at each terminal is always changing.
B) AC current does not involve charged particles.
C) AC current is safe and warning labels are not needed.
D) AC voltage at each terminal is always higher than ground.