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What are the three components of a lever?

A Fulcrum, resistance arm, and effort arm
Explaination
The three key components to a properly functioning lever are: a fulcrum, an effort arm, and a resistance arm. While a plane is a component of levers, this is not strictly necessary; a variety of implements may be used to create a lever effect.
B A wide plane, fulcrum, and effort arm
C Resistance arm and effort arm
D A point of origin and solid plane