Which program requires concurrent enrollment?

Dual credit requires concurrent enrollment.

Concurrent enrollment, more commonly known as dual enrollment, refers to programs where students are enrolled in two schools simultaneously. Many dual enrollment programs involve high school students simultaneously taking college classes, most often at a local community college. Others are specially developed programs where students take classes to receive both high school and college credit from the same class at the same time

answer; first blank; insulation; second blank; //insulation; good luck