A Pendulum Is Composed of a Mass M Suspended from the Ceiling

Multiple Choice

A pendulum is composed of a mass m suspended from the ceiling by a massless string of length L.The mass is pulled back,raised and released.If the tension in the string at the bottom of the swing is 2mg,how high was the the mass raised above the bottom of the swing?

A) 0.33 L
B) 0.25 L
C) 0.10 L
D) 0.50 L
E) 0.67 L