Answer:
The best explanation regarding the observation of more mitochondria in cell A than in cell B is that cell B does less work than Cell A.
Step-by-step explanation:
Mitochondria are the organelles in charge of energy production in the cell. Tissues with high energy demand, such as striated muscle, have cells with a large amount of mitochondria, to satisfy this requirement.
According to the observation, if the cell B has less work than the A cell, its energetic demand is lower and the consequence is a smaller quantity of mitochondria in its cytoplasm.
The other options are not correct because:
A and B. The fact that the A cell has more mitochondria is not related to protein synthesis or having larger vacuoles.
D. Cell B does not produce more energy than Cell B because it has fewer mitochondria.