Two students are working together on an experiment that measures the effect of different liquid fertilizers on the thickness of plants' stems. Which is most likely to result in the greatest amount of error in their scientific experiment?

Since you don't have any choices presented for the question, I'll just proceed on discussing possible errors that would be made in this scientific experiment.

The errors could root from:

-measurement of the thickness incosistently (at different times of the day)

-the instrument used is different in each measurement

-no regard of significant figures

-standard deviation from the mean is not calculated and not propagated