In the design of a front counterfort in a counterfort retaining wall, the main reinforcement is provided on_______________?

1. bottom face near counterfort
2. top face near counterfort
3. bottom face near centre of span
4. top face near centre of span The correct answer is
A. only (1)
B. only (2)
C. both (1) and (4)
D. both (2)and (3)