Which of the Following Is True for the Limit $\lim _ { x \rightarrow 0 } \frac { 1 - \cos ^ { 2 } x } { 3 x }$

Multiple Choice

Which of the following is true for the limit $\lim _ { x \rightarrow 0 } \frac { 1 - \cos ^ { 2 } x } { 3 x }$

A) $- \frac { 1 } { 3 }$
B) 0
C) $\frac { 1 } { 3 }$
D) 3
E) Does not exist