During an Experiment to Identify Essential Nutrients, All but One

Multiple Choice

During an experiment to identify essential nutrients, all but one class group observed the effects of micronutrient deficiencies on plant growth. Which of the following is the best explanation for the normal plant appearance in the one outlier group?

A) The discrepant group did not pipette accurately.
B) The discrepant group mislabeled their containers.
C) The discrepant group used tap water instead of deionized (distilled) water.
D) The discrepant group forgot to add micronutrient solution.