Answer:
He has.
Step-by-step explanation:
In the English Grammar sentence construction and diction, it is first and foremost important to see how the sentence is made and what the subjects are or is. And in this given sentence, the generalization of the student entering college can be taken as a singular subject.
Thus, accordingly, the use of the pronoun/ subject and the corresponding verb form will be "he has" instead of the plural denotation "they have". Thus, the correct answer is "he has".