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Period of Sine Graph

ACTMAT-QE4EJO

Which of the following is the period of this sine graph?

A

$ {\cfrac { \pi }{ 3 } } $

B

$ {\cfrac { \pi }{ 2 } } $

C

$ {\cfrac { 2\pi }{ 3 } } $

D

$ {\pi} $

E

$ {2\pi} $