The typical number of courses required to finish a major can vary depending on the specific program and university. However, in general:
- A. 12 courses seems too low for completing a major as it might not cover all the necessary topics and depth of knowledge required.
- B. 22 courses could be a reasonable estimate for completing a major in some fields, but it might be on the higher side for others.
- C. 15 courses is a common number for completing a major. It provides a balance between depth of study and time required to finish the program.
- D. 10 courses might be too few to cover all the essential aspects of a major thoroughly.
Therefore, option C, 15 courses, is a reasonable estimate for the typical number of courses needed to finish a major in many academic programs.