Rolling resistance of a wheel depends upon (i) Vehicle load (ii) Grade (iii) Ground conditions%!

Rolling resistance of a wheel depends upon (i) Vehicle load (ii) Grade

1.	Rolling resistance of a wheel depends upon (i) Vehicle load (ii) Grade (iii) Ground conditions%!
A.	Only (i) is correct
B.	(i) and (ii) are correct
C.	(i) and (iii) are correct
D.	(ii) and (iii) are correct
Answer» D. (ii) and (iii) are correct