The difference between the two students that we know of is that they used a different meter stick. So the difference would be best attributed to the different tools they used.
Note, this is quite a huge difference. It's likely that one of the sticks, or both, are quite defect.
Answer:
13. is Option J) all of the above
and 14 I'm not completely sure but I think its option D.
I think carbon dioxide then sugars
