The Advanced Placement (AP) exams use a scoring scale from 1 to 5 to determine a student's proficiency in the subject matter. On this scale:
- A score of 5 indicates that the student is "extremely well qualified."
- A score of 4 indicates that the student is "well qualified."
- A score of 3 means the student is "qualified."
- A score of 2 shows the student is "possibly qualified."
- A score of 1 suggests that the student is "no recommendation."
Given this information, we are looking for the score that corresponds to a student being "well qualified." From the scale above, we can determine that a "well qualified" score is a 4.
So, the correct answer is:
B. 4