Joseph Gayette invented it in 1857 to prevent piles – what?

1. reduces the negative moment at support
2. increases the negative moment at support
3. reduces the positive moment at center of span
4. increases the positive moment at center of span
The correct answer is?
 
A. (1) and (3)
B. (1) and(4)
C. (2 )and (3)
D. (2) and (4)