Rewrite as a Single Logarithm $2 \log _ { b } x - \log _ { b } y$

Multiple Choice

Rewrite as a single logarithm. Assume all variables represent positive real numbers.
- $2 \log _ { b } x - \log _ { b } y$

A) $\log _ { b } x ^ { 2 } \div \log _ { b } y$
B) $\log _ { b } \frac { x ^ { 2 } } { y }$
C) $\log _ { b } \left( x ^ { 2 } - y \right)$
D) $\log _ { b } \frac { 2 x } { y }$