An upper limit of oil content is limited to about __________ percent for achieving efficient and satisfactory level of wax sweating.$?

An upper limit of oil content is limited to about __________ percent f

1.	An upper limit of oil content is limited to about __________ percent for achieving efficient and satisfactory level of wax sweating.$?
A.	5
B.	15
C.	40
D.	60
Answer» D. 60