In a counterfort retaining wall, the main reinforcement is provided on the_______________?

1. bottom face in front counterfort
2. inclined face in front counterfort
3. bottom face in back counterfort
4. inclined face in back counterEort
The correct answer is
A. (1) and (ii),
B. (2) and (3)
C. (1) and (4)
D. (3) and (4)