The correct answer is A.
(A) The price per hour was slightly more expensive for those who bought individual hours.
Impact:
This means that students who purchase sessions individually actually pay more per hour than those who buy 10-hour packages.
Implication: If paying more per hour were the main driver of motivation, then the individual-hour buyers should be even more motivated to attend and miss fewer sessions. However, they miss sessions more frequently (1 in 5) compared to package buyers (1 in 10).
Thus: This factor calls into question the explanation that financial investment is the key motivator. It suggests that despite a higher per-hour cost (i.e., greater money at stake per session), individual buyers still miss more sessions, which undermines the idea that money invested is responsible for better attendance.
(B) Many students who missed or rescheduled sessions did so although they made a strong verbal commitment beforehand to be present.
Impact:
This provides an alternative behavioral factor (verbal commitment) but does not directly challenge the idea that money invested affects attendance.
(C) All students must pay a 10% fee for rescheduling any tutoring session, but if a student cancels a session entirely, the entire cost is forfeited.
Impact:
While this fee structure might influence behavior, it applies equally to both individual-hour buyers and package buyers. It does not explain the difference between the two groups.
(D) Upon purchase of any tutoring hours, students are required to immediately schedule all the purchased hours.
Impact:
This requirement applies to both groups and therefore cannot account for the difference in missed sessions based on the type of purchase.
(E) Students who try to reschedule tutoring sessions without enough notice may not be able to make up the session in a timely fashion, so that it counts as a missed session.
Impact:
This speaks to how missed sessions are recorded, but it would affect both groups similarly, so it doesn’t explain the difference.