Choose the One Alternative That Best Completes the Statement or Answers

Choose the one alternative that best completes the statement or answers the question.
Write the equation in exponential form.
- $$\log _ { 8 } 512 = b$$

A) $b ^ { 8 } = 512$
B) $b ^ { 512 } = 8$
C) $8 ^ { b } = 512$
D) $512 ^ { b } = 8$