Joe is conducting an experiment to determine which liquid will cause bean plants to grow faster. he watered the plants with equal amounts of liquid and measured their height every other day. the plants are in the same pots with different soils and placed in the same location. will joe be able to obtain reliable data to write a supported conclusion?
a. yes, because he is only observing the height of the plant.
b. yes, because he consistent with watering the plants.
c. no, because he used different soils.
d. no, because he use only one type of plant.