Abearing is designed to a reduce friction b. support a load c. guide moving parts such as wheels, shafts and pivots d. all of the above

Option (A)

Explanation:

A ball bearing is a device which is use to reduce the friction.

The outer rim of the bearing is fixed with the part of machine and inner rim is fitted into shafts. Now the shafts rotates and only the small spheres in the bearing will rotate. The friction can be further reduced by apply the oil or grease to the bearing.

answer; ///i believe that the correct answer is (carbon); good luck

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