A biology student wants to determine if using a fertilizer would help promote the growth of new babies in spider plants. The student chooses 100 baby spider plants to be used in the study. They all are potted in the same amount and type of soil, given the same amount of water, and exposed to the same amount of light. Half of the plants are randomly assigned to the group that receives fertilizer every three months and the remaining plants are assigned to the group that does not receive fertilizer. After one year, the shoots are counted for each plant. The average number of shoots for the plants receiving fertilizer is compared with the average number of shoots for the plants that did not receive fertilizer. Is this a completely randomized design?

Yes, the plants were randomly assigned each treatment.
Yes, the plants received the same amount of soil, water, and light.
No, only spider plants were used.
No, the plants did not all receive the same treatment.