Effect of Fertilizers on Plant Growth

In a recent experiment, researchers studied the effect of different fertilizers on the growth rate of tomato plants. Over a period of 4 weeks, they recorded the height of plants using three types of fertilizers: A, B, and C. The results were as follows:

• Fertilizer A: Week 1 - 10 cm, Week 2 - 20 cm, Week 3 - 30 cm, Week 4 - 40 cm
• Fertilizer B: Week 1 - 12 cm, Week 2 - 18 cm, Week 3 - 29 cm, Week 4 - 39 cm
• Fertilizer C: Week 1 - 9 cm, Week 2 - 15 cm, Week 3 - 22 cm, Week 4 - 30 cm

Based on the data collected, which fertilizer resulted in the highest average growth over the 4-week period?