Which college classes would a student most likely take to become an oceanographer? Select 4 choices.

I do not see the four choices, but here are the likelihoods; biology, chemistry, geology, and physics.

This is because there are four main components of study when it comes to becoming an oceanographer:

biological - studying marine plants and animals

physical - exploring water temperature, density, wave motion, tides and currents

geological - examining the structure and make-up of the ocean floor

chemical - analysing the chemicals in sea water and the impact of pollutants