Question

A scientist hypothesizes that Earth's axis changes the angle of its tilt over the course of several thousand years.

Which of the following is the best way for the scientist to test this hypothesis?
make a computer model showing Earth's motion in space
place motion sensors at the north and south poles to determine the position of the axis
set up a controlled experiment using the other planets in the solar system as experimental groups
place a camera on a satellite orbiting Earth and record the Earth's movements