The answer is c i believe
10 years ago, when recommended that no more than 10 percent of daily calories come from sugar. Sugar intake directly leads to obesity and tooth decay.
Have a schedule, some kind of goal, some kind of reward along the way.
Mitochondria make energy for the cell to work and function. The chloroplast turn sun light into chemical energy. I guess you could say, that they use each-others energy.
Hope I helped!