Answer:
Option "D" is most suitable answer for the question.
Step-by-step explanation:
Ceteris paribus involves keeping all other variables stable. So in our situation, because we recognize that a rise in tuition fees could result in fewer people deciding to join college, we believe that other causes that we don't realize might affect fewer people choosing to join university will stay.
Therefore Option "D" is the most suitable option for the above type of problem.