Answer:
Both AC and DC describe types of current flow in a circuit. In direct current (DC), the electric charge (current) only flows in one direction. Electric charge in alternating current (AC), on the other hand, changes direction periodically.
The Answer is Option C
I think...
Sorry If i am wrong...
Devon will travel 180m in 12 seconds. All you have to do is multiply 15 by 12. Hope this helps