For thin slabs and walls, the maximum size of coarse aggregates should be limited to ______ thickness of the concrete section.

For thin slabs and walls, the maximum size of coarse aggregates should

1.	For thin slabs and walls, the maximum size of coarse aggregates should be limited to ______ thickness of the concrete section.
A.	one-third
B.	one-fourth
C.	two-third
D.	three fourth
Answer» C. two-third