4. Which of the following statements is true? (1 point)

a. To increase power, you can decrease the amount of work you do in a given amount of time, or you can do a given amount of work in less time

b. To increase power, you can decrease the amount of work you do in a given amount of time, or you can do a given amount of work in more time

c. To increase power, you can increase the amount of work you do in a given amount of time, or you can do a given amount of work in less time.

d. To increase power, you can increase the amount of work you do in a given amount of time, or you can do a given amount of work in more time