Which type of course must be completed before entering a program or taking higher-level courses?

The correct answer is Prerequisite Course. This type of course is specifically designed to ensure that students have the necessary foundational knowledge and skills required before advancing to more complex subjects or entering a program. Prerequisite courses serve as essential building blocks; they prepare students for the demands of higher-level courses. By completing these courses first, students can ensure they have a solid understanding of the material that will be further explored, thereby enhancing their chances of success in more advanced studies.

In contrast, elective courses offer choice and flexibility, allowing students to explore interests outside of their declared program but are not required for progression in a specific academic area. Core courses are foundational courses necessary for a particular program but may not necessarily need to be completed before enrolling in other courses. Supplementary courses may provide additional support or enrichment but do not fulfill mandatory entry requirements for higher-level programs.