*$_If the depth of an excavation is 20 meters, number of single stage well points to be installed at various levels, is?

*$_If the depth of an excavation is 20 meters, number of single stage

1.	*$_If the depth of an excavation is 20 meters, number of single stage well points to be installed at various levels, is?
A.	5
B.	4
C.	3
D.	2
Answer» D. 2