The correct answer is B. Supplementary
That is the basic definition of what supplementary angles are and can be found in any textbook.
Answer/explanation
4(3x+5)=-4
You will distribute the four to every term in the parenthesis,
12x+20=-4
Then you will combine like terms
12x+20=-4
-20 -20
12x=-24
Then you will divide 12 to isolate x

Obviously, -24 cancels out and you would get x=-2
It would be the distributive property. :)
The product would be -4984.