Answer:
Disappointed by his performance, Harry left the room.
Explanation:
Since the function of the comma is to show where there is a slight break or pause in the sentence, it is used as shown.
Sentence 4 about year round schooling helps students learn and retain more seems not to be backed up with the evidence and that it may just be a supposition as a better approach might be to coampare the pros and cons of each and at least include the importance of students having a break to rest their brains as constant schooling could become oppressive.
I’ve never read this story but my gut is going with A
From top(1) to bottom(10); the spoken sentences should be 1,3,4,7,8,9.
