Marge Simpson decided to start a new garden in her backyard. She heard that plants compete for space and decided to testis idea. She bought a mixture of flower seeds and some potting soll She put the same amount of soil into each of 5 plastic cups. In the
first cup she planted 2 seeds, in the second cup she planted 4 seeds, in the third 8 seeds, and in the fourth cup ste planted 16
seeds. In the last cup she planted 32 seeds. After 25 days, she determined which set of plants looked the healthiest
What is the control group?