You are designing a sustainable living space for the Mars Colony Mission. The colony will have plants growing inside of it to recycle the carbon dioxide. You need to determine what type of lighting will be most beneficial to the plants. First you pick a small set of sample plants and grow each in a different lighting. What is the BEST way to measure their effectiveness? A. Measure the oxygen produced by the plant using a gas syringe. B. Measure the pigment density in the leaves using a spectrophotometer. C. Measure the height of the plant with a ruler. D. Measure the carbon dioxide produced by the plant using a gas syringe.