Solve the Equation $$e ^ { 4 x } e ^ { 4 x } = e ^ { 4 }$$

Multiple Choice

Solve the equation. Round to the nearest thousandth.
- $$e ^ { 4 x } e ^ { 4 x } = e ^ { 4 }$$

A) $\{ 0.643 \}$
B) $\{ 1.640 \}$
C) $\{ - 0.640 \}$
D) $\{ 0.500 \}$