We pivot the compass needle on a sharp pin
A) To minimize the magnetic effect on the pin
B) To maximize the magnetic effect on the pin
C) To minimize the friction between the pin and the compass needle so that it move freely.
D) To ensure that the compass needle will not drop from the pivoted point
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By pivoting the compass needle on a fixed pin, the friction between the needle and the fixed pin is minimized and the compass needle can rotate freely to the magnetic field in the region.
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