I believe the answer is "I"
She will have 63 students in total so that would mean you will have 7 groups and 9 students in each group
Yeah I believe so but you could spice it up a little bit if you want it's up to you.
Typically, the use of ellipses indicate that there is a small pause that the reader should take before reading more. usually ellipses are used for dramatic moments, to help build suspense, or sad moments in a story.