you
Explanation:
hhh 我开玩笑的。。。。。。。。。。。。。。。。。
A. Crafty its no b its not c it not D its A.
Answer:
A gear is a rotating circular machine part having cut teeth or, in the case of a cogwheel or gearwheel, inserted teeth (called cogs), which mesh with another toothed part to transmit torque. A gear may also be known informally as a cog.