A pendulum clock is a clock that uses a pendulum, a swinging weight, as its timekeeping element. We can approximate the pendulum of the clock as a simple pendulum, a weight of mass m attached to a very thin cord of length L. If you increase the mass of the weight by 10 percent, how will you have to adjust the length L of the pendulum so that the clock continues to run accurately?
 

a). The new length should be the same as the old one.
b). The new length should increase by 10 percent.
c). The new length should increase by 3.16 percent.
d). The new length should decrease by 3.16 percent.
e). The new length should decrease by 10 percent.