ANSWER
The correct answer is C.
Step-by-step explanation
The given polynomial has equation

According to the Remainnder Theorem, if (b+4) is a factor of p(b) = b³+3b²-b+12 then

We now substitute b=-4 to check.


Simplify:

Since p(-4) is zero, (b+4) is a factor of p(b) = b³+3b²-b+12.
The correct choice is C.