Which of the following surface has a maximum Kuichling‚Äö√Ñ√∂‚àö√ë‚àö¬•s impermeability factor?$

Which of the following surface has a maximum Kuichling‚Äö√Ñ√�

1.	Which of the following surface has a maximum Kuichling‚Äö√Ñ√∂‚àö√ë‚àö¬•s impermeability factor?$
A.	Gravel road
B.	Water tight roof surface
C.	Unpaved surface
D.	Macadamized road ways
Answer» C. Unpaved surface