The correct answer is enroll.
The correct answer is (D) To enroll or enlist, usually as a student in a university or college. To enroll, or admit (a student) to membership and privileges by enrolling, esp. in a college or university. To be enrolled as a member of a university or college.
Matriculate comes from Middle Latin matriculare (to register).
Examples of use:
- She will matriculate next year.
- Unlike his future associates, Bill matriculated at Oxford.