4 is the correct answer on apex

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.
Answer:
2.....................................
The answer is Alexander Pope. Hope this helps :)
Answer:
A subject and a predicate! :)