Answer :
Answer:
d. the additional technology fee that is paid per credit hour
Explanation:
Since in the question it is mentioned that the full time students should take minimum 12 credit hours but it would take maximum of 18 credit hours
Now the student signed up for 15 creditor hours and he wants to add one more so the marginal cost or benefit that can impact the decision of the students is that the extra technology fee that should be paid for per credit hour
Hence, the option d is correct