I disagree with the current answer. I believe the answer is the one you have selected. This is because the three domains of life are separated into 3 categories, bacteria, archeabacteria, and eukaryotes. Archeabacteria are prokaryotic, and possess no true nucleus.
C is the answer I just check it on mine
experiment to determine how the type of food source available affects the rate of cellular.
The answer is A. The ratio goes down as the size of the cell gets larger.