Answer:
A
Step-by-step explanation:
When we have more students that enjoy studying history than enjoy studying math and science needed to get a degree in Chemical engineering , this will lead to a large no of history graduates in the labor market making the availability of chemical engineers graduate to be fewer and the demand for it higher.
This in effect cause a higher income for the chemical engineers as they become more of a scarce resources compared to history despite the students spending the same number of years to graduate in the college.