Help and it’s 20 points

Answer:
b and d
Step-by-step explanation:
a=-4
b=-2
c=0
d=2
-2 is the opposite of 2
0 im not so sure about, because the opposite of a number is the negative (or positive) of that number. So for every other number, say 10, the opposite is -10, so we would say -0 is the opposite of 0, but -0 isnt a number. So, b and d are the correct answers