A student response survey found that students who paid for 10 or more

Question

A student response survey found that students who paid for 10 or more in-person tutoring sessions on an hour-by-hour basis missed or rescheduled a session on average once every five sessions. By contrast, those students who purchased tutoring sessions in ten-hour packages missed or rescheduled a session on average only once every ten sessions. This indicates that students are at least partly motivated by the amount of money they have invested for in-person tutoring.

Which of the following, if true, calls into question the explanation above?

(A) The price per hour was slightly more expensive for those who bought individual hours.

(B) Many students who missed or rescheduled sessions did so although they made a strong verbal commitment beforehand to be present.

(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.

(D) Upon purchase of any tutoring hours, students are required to immediately schedule all the purchased hours.

(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.

ritik0212 · Answer

A. probably assumes that others are buying 10 sessions, on a per session basis.
If not, then still their investment is going to be less that 10 session package.

madinapatra · Answer

why not C 
if you have to pay even though u miss a lesson, that would undermine the claim that paying motivates u not to skip

Aish.0505 · Answer

My take (happy to be corrected):
The conclusion says that students are at least partly motivated by the  amount of money they have invested  in tutoring. So, to weaken this, we need to show either (1) the difference in missed sessions wasn't because of money, or (2) students who paid more actually missed more sessions.
Option C talks about a  penalty for rescheduling or canceling —but this applies  uniformly to all students , whether they paid per hour or in packages. So, it doesn't explain why students who paid for 10-hour packages missed fewer sessions. It introduces a future cost, not the upfront investment that the argument is focused on.
Therefore, Option C doesn’t weaken the idea that it's the  initial investment amount  (i.e. paying for 10 sessions upfront) that influenced student behavior.

A student response survey found that students who paid for 10 or more

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