Courtney and kenzie are doing an experiment to determine which fish food gives their fish more energy. they have two fish tanks, each with the same number, size, and type of fish. the tanks are the same size and have identical filters and decorations. they were both filled with store-bought spring water and are cleaned at the same time. when the girls submitted their results to a journal for publication, scientists criticized the experiment.

what about the experiment would need to be changed so that scientists might accept their findings?

a) the fish would need to be fed more food.
b) the tanks would need more fish in each one.
c) there would need to be several more tanks of fish.
d) the tanks would need to have a different type of water.