Evaluate the Given Integral Using the Substitution $\int e ^ { - 4 x } \mathrm {~d} x ; u = - 4 x$

Evaluate the given integral using the substitution.
$\int e ^ { - 4 x } \mathrm {~d} x ; u = - 4 x$

A) $- e ^ { - 4 x } + C$
B) $- 4 e ^ { - 4 x } + C$
C) $- \frac { 1 } { 4 } e ^ { - 4 x } + C$
D) $- \frac { 1 } { 4 } e ^ { - 8 x } + C$
E) $- e ^ { - 8 x } + C$

Correct Answer:

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