Which of the following sentences is punctuated correctly?
A.
Colleges consider grades, standardized test scores, writing samples, and recommendations before accepting
potential students

B. Colleges consider grades standardized test scores writing samples and recommendations before accepting potential
students

C.Colleges consider grades, standardized test scores, writing samples, and recommendations, before accepting
potential students

D. Colleges consider grades standardized test scores, writing samples, and recommendations, before accepting
potential students