Choose the One Alternative That Best Completes the Statement or Answers

Multiple Choice

Choose the one alternative that best completes the statement or answers the question.
Solve the equation.
- $\sqrt [ 5 ] { 49 } = 7 ^ { t }$

A) $\{ 10 \}$
B) $\left\{ \frac { 2 } { 5 } \right\}$
C) $\{ 5 \}$
D) $\left\{ \frac { 1 } { 5 } \right\}$