A scientist wants to determine the effect of fertilizer on plant growth. She plants two rows of corn for experimentation. She puts fertilizer on row 1 but does not put fertilizer on row 2. Both rows receive the same amount of water and light intensity. She checks the growth of the corn over the course of 5 months and measures the height of the plants in centimeters. Row 1 increased in height by 28.1 cm. Row 2 increased in height by 13.4 cm.

What should the scientist conclude from this experiment?

A Fertilizer has no effect on the corn’s growth

B The reason for Row 1’s increase in height cannot be determined

C Row 2 didn’t grow as high because it needed more light

D Fertilizer helps increase corn’s height