A.Ball bearings are used to increase friction between parts of a machine.✓ Correct
B.Friction between two surfaces in contact can never be eliminated on earth.
C.Rolling friction is less than sliding friction.
D.The friction force on an object moving through a fluid depends upon its shape.
Explanation
Ball bearings are used to REDUCE friction, not increase it, by converting sliding friction into rolling friction which is much smaller. The other statements are all correct: friction cannot be eliminated entirely, rolling friction is less than sliding friction, and fluid friction depends on shape (streamlining).
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