Students can earn a certificate at a:

A. private university.

B. religious school.

C. vocational or technical college.

D. public university.

I would sat the answer you want is going to be C. vocational or technical college.

Answer with explanation:

→In Private university, we get Degree on completing a Course, but some private university, on part time basis, provides certificate also, for completing a three month or a six month course.

→Religious school, usually imparts, value education to children.

→Public university provides degree for most of the courses, as well as Certificates for 1% of the courses.

→But Vocational or technical college, mostly provides Certificates for most of the courses which it provides and the certificate course varies from 3 months to a whole year.

Option C→→Vocational or technical college.