To decrease the amount of time required to work without changing the total amount of work, you need to
a. increase power
b. increase distance
c. decrease power
d. decrease distance

A. Increase power

The relationship between power, work, and time is:
Power = work / time

So power is the rate of work done. It is visible that power and time obey an inverse relationship, so if one wants to decrease the time taken with a constant amount of work, one would increase the power.

The answer is d) by requesting advice on science internet sites