Common EntranceBasic ScienceSimple Machines

Which simple machine is used to raise a flag to the top of a flagpole?

Awedge
Blever
Cscrew
DpulleyCORRECT
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Toaster Teacher
Why the answer is D, and why the others tempt you.
A pulley is a wheel with a rope; pulling down on the rope raises the flag.
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