Find the coordinates of the vertices of the figures formed by:

y<=x+2, x+y <=6, and y>= -2

A. (0,0), (2,4), (8,-2)
B. (-4,-2), (2,4), (8,-2)
C. (-4,-2), (4,2), (8,-2)

I have substituted all of the above in the equations and they all are true. I'm confused.

Thanks.