By Changing the Logarithm to Exponential Form, Evaluate the Common $\frac { 1 } { 2 }$

Multiple Choice

By changing the logarithm to exponential form, evaluate the common logarithm without the use of a calculator.
-log 100

A) $\frac { 1 } { 2 }$
B) 20
C) 2
D) $\frac { 1 } { 5 }$