Answer:
Group A rats may have higher blood insulin levels in step 4.
Step-by-step explanation:
Group B rats are on an intermittent fasting diet, which means that the blood sugar level of these rats is low and, consequently, insulin levels will also be low, since insulin is the hormone that allows the entry of sugar in the cells. In addition, intermittent fasting can damage insulin excretory cells, further decreasing the level of this hormone in the blood.
However, the group A rats were fed with chocolate bars, which increased the levels of sugar in their blood, causing the body to release more innsulin so that this sugar could be absorbed by the cells.
In this case, we can say that group A mice have more insulin in their blood than group B mice during phase 4 of the experiment.