Answer:
if you wait 5 minutes i can have the whole thing wrote for you
Answer:
Not really sure might be A
Explanation:

To prevent warping, thin, organic bonded wheels such as those used for cutting-off should be laid flat on a horizontal surface of steel or similar rigid material away from excessive heat and moisture.22 To minimise deterioration, wheels must be stored in a room which is dry and not subject to extreme temperatures.