Change the Exponential Expression to an Equivalent Expression Involving a Logarithm

Multiple Choice

Change the exponential expression to an equivalent expression involving a logarithm.
- $2.3 ^ { x + 5 } = 15$

A) $\log _ { ( x + 5 ) } 15 = 2.3$
B) $\log _ { 15 } ( x + 5 ) = 2.3$
C) $\log _ { 2.3 } 15 = x + 5$
D) $\log _ { 2.3 } x = 10$