Solve the Equation $168 ( 1.31 ) ^ { x / 2 } = 336$

Multiple Choice

Solve the equation. Round to the nearest thousandth.
- $168 ( 1.31 ) ^ { x / 2 } = 336$

A) $\{ 6.444 \}$
B) $\{ 3.824 \}$
C) $\{ 5.134 \}$
D) $\{ 0.779 \}$