Which of the following would you need in order to compare the effect of two different fertilizers on plant growth? a. a way to measure plant growth b. a variety of plant species c. a selection of soil types d. a cardboard box to cover one plant

What is the best conclusion based on this data? the hypothesis was not supported because the data indicated that fertilizing plants does not improve plant growth. the hypothesis was supported; to get the best growth, use 5 milliliters of fertilizer per plant. the hypothesis was not supported; the data indicated that too much fertilizer can inhibit plant growth. the hypothesis was supported; to get the best growth, use 15 milliliters of fertilizer per plant.