Based on the function, piles can be classified into Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â types.

Based on the function, piles can be classified into Â Â Â Â �

1.	Based on the function, piles can be classified into Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â types.
A.	4
B.	6
C.	8
D.	3
Answer» D. 3