HURRY!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
 A screw is a type of simple machine. If we look closely at a screw, we see that it is really a _________ wrapped around a central core.
 A) wedge 
 B) lever 
 C) fulcrum 
 D) inclined plane