A Pendulum That Was Originally Erected by Foucault at the Pantheon

Multiple Choice

A pendulum that was originally erected by Foucault at the Pantheon in Paris for the Paris Exhibition in 1851 was restored in 1995. It has a 28.0 kg sphere suspended from a 67.0-m light cable. How long would it take for the bob in this pendulum to move from the position of maximum displacement back to the equilibrium point?

A) 4.11 s
B) 21.5 s
C) 2.58 s
D) 32.2 s
E) 42.9 s