For heavy embankments and dams, of height h , the depth of exploration of soil should not be less than

For heavy embankments and dams, of height h , the depth of exploration

1.	For heavy embankments and dams, of height h , the depth of exploration of soil should not be less than
A.	h /4
B.	1/2 h
C.	h
D.	2 h .
Answer» E.