Find the Intervals on Which the Given Function Is Increasing $-$

Multiple Choice

Find the intervals on which the given function is increasing and the intervals on which it is decreasing. f ( x ) = $-$ 2 x 2 $-$ 16 x $-$ 49

A) $\text { Increasing on } ( - \infty , - 4 ] \text { and decreasing on } [ - 4 , \infty )$ .
B) $\text { Increasing on } [ - 4 , \infty ) \text { and decreasing on } ( - \infty , - 4 ]$ .
C) $\text { No correct answer }$ .