Kevin decides to find out which fertilizer is best for tomatoes. He pots up three plants, all with the same soil, giving one no fertilizer, giving the second type A fertilizer, and giving the third type B fertilizer.
In this experiment, what is the control, or Kevin's standard for comparison?
Responses
AThe soil used for every plant.
The soil used for every plant.
BThe plant that got no fertilizer.
The plant that got no fertilizer.
CThe plant that got type A fertilizer.
The plant that got type A fertilizer.
DThe plant that got type B fertilizer.