Abby wants to know if leaves are capable of making food during night time. How can Abby determine the experimental design she should do to get an accurate answer to her question?

A. Put one potted plant in a very dark place over night and test for the presence of starch.

B. Cover the plant with paper bag overnight and test for the presence of starch.

C. Put one potted plant under the sun and the other in the shaded area for two hours and test

for the presence of starch.

D. Cover one leaf of a potted plant with carbon paper for two hours and test for the presence of starch.