Angela wants to conduct an experiment to test how different types of music impact the growth of plants What should Angela use as constant variables in the experiment?
A. Amount of light the plant is exposed to, amount of water the plant receives
B. Amount of oxygen the plant absorbs, amount of glucose the plant produces
C. Amount of oxygen in the plant absorbs, amount of glucose the plant produces
D. Amount of carbon dioxide the plant absorbs, amount of water the plant receives