Change the Exponential Expression to an Equivalent Expression Involving a Logarithm

Multiple Choice

Change the exponential expression to an equivalent expression involving a logarithm.
- $$6 ^ { 5 } = 7776$$

A) $\log _ { 7776 } 6 = 5$
B) $\log _ { 6 } 7776 = 5$
C) $\log _ { 1 / 5 } 7776 = 6$
D) $\log _ { 5 } 7776 = 6$