Answer:
Alternating current changes the direction of the current flow.
Option A is correct.
Explanation:
Alternating current :
In alternating current, the electric current change direction in regular time interval.
Direct current :
In direct current, the electric current moves in one direction.
Advantage of alternating current,
1. The alternating current generators have higher efficiency.
2. The alternating current can be easily converted into direct current.
3. The alternating current is used in power supply to households.
4. In the AC circuit, the AC voltage can be easily transformed to high voltage or low voltage using transformer.
Hence, Alternating current changes the direction of the current flow.
