Final answer:
The exact percentage of students changing majors is not provided in the given information; however, it is commonly known that many students do change their major at least once during college, with estimates ranging from 50% to 80%.
Step-by-step explanation:
The percentage of students who typically change their major after choosing it is not directly provided in the information given, but we can reference related statistics to inform our discussion. For example, we can infer from provided statistics, like the 85 percent of graduating students attending their graduation and the 8 percent of high school students participating in after-school sports all four years, that changing majors is a normal part of many students' college experience. Based on data and trends from various institutions, a commonly cited figure is that around 50 to 80 percent of students change their major at least once during their college career, indicating that option b) 78% would be a reasonable estimate. However, without specific data on major changes from the provided information, an exact percentage of students changing majors cannot be definitively stated.