Find the four arithmetic means between 12 and -13.
A6, -1, -3, -8
B6, 2, -3, -8
C7, -1, -3, -8
D7, 2, -3, -8
A6, -1, -3, -8
B6, 2, -3, -8
C7, -1, -3, -8
D7, 2, -3, -8