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.
You end up with a polyploid condition. Not uncommon in organisms, especially plants, like angiosperms.
Look up "polyploidy".
The correct answer would be letter C.
Answer:
This process would be the one truly responsible for the "evolution" of mitochondria and chloroplasts as we know them from their prokaryotic ancestors. The cell process that would have initiated endosymbiosis is endocytosis; the process of taking things inside the cell
Centimeter = 1/100 of a Meter
Kilometer = 1000 Meters
86,000/100 = 860 Meters
860/1000 = 0.86 Kilometers