Evaluating Fertilizer Effectiveness

A researcher conducted an experiment to evaluate the impact of different fertilizers on plant growth. Four different types of fertilizers (Fertilizer A, Fertilizer B, Fertilizer C, and Fertilizer D) were applied to identical plants over a period of three weeks. The height of the plants (in cm) was measured at the end of the experiment, and the results were recorded as follows:

Fertilizer A: 25 cm
Fertilizer B: 30 cm
Fertilizer C: 35 cm
Fertilizer D: 40 cm

Based on the experimental data, which fertilizer resulted in the greatest average plant growth?