A simple pendulum consists of a massive bob connected to the end of a very light string. Which one of the following changes should be made in order to increase the period of the pendulum? Ignore air resistance.
(A) Increase the mass of the bob
(B) Decrease the mass of the bob
(C) Increase the length of the string
(D) Decrease the length of the string
(E) Decrease the maximum angle of the pendulum's oscillation