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$F$ is a function defined for all real numbers $x$. If,

$$F'(x) = \frac{{\left| {{x^2} - 16} \right|}}{{x + 4}}$$

then $F$ is increasing on which interval?

$(-\infty, -4)$

$(-4, \infty)$

$(-\infty, \infty)$

$(4, \infty)$