Answer:
E. 12P
Step-by-step explanation:
The power can be calculated as work divided by time, so the first force produces power P and it is equal to:

If we have a second force that produces power P₂, where the work is six times W and the time is half time T, we get:

Since W/T = P, we get that

Therefore, the power produce by a force that does six times as much work in half as much time is 12P.