The correct answer is C) By mechanically or electrically applying forces to precess the gyroscope. A gyroscope's spin axis tends to remain fixed in space, but this alone does not make it "north seeking" for use as a compass. To align the gyroscope with north, forces must be applied to precess or rotate the gyroscope's spin axis until it points to true north. This can be done mechanically, such as with a gimbaled mount, or electrically, by applying current to torque motors that induce precession. The other answer choices are incorrect because they do not fully explain how a gyroscope is made to point north for compass use.