Find the Limit of the Function by Using Direct Substitution $\lim _ { x \rightarrow 0 } ( \sqrt { x } - 2 )$

Find the limit of the function by using direct substitution.
- $\lim _ { x \rightarrow 0 } ( \sqrt { x } - 2 )$

A) 0
B) Does not exist
C) $- 2$
D) 2