Express as the Logarithm of a Single Expression $\log _ { 2 } 12 + \log _ { 2 } 7$

Multiple Choice

Express as the logarithm of a single expression. Assume that variables represent positive numbers.
- $\log _ { 2 } 12 + \log _ { 2 } 7$

A) $\log _ { 4 } 84$
B) $\log _ { 2 } 84$
C) $\log _ { 2 } 19$
D) $\log _ { 4 } 19$