A. More phagocytes and lymphocytes are needed to fight the infection.
Phagocytes and lymphocytes are basically the white blood cells in our body that are used to fight off infections and diseases. Naturally, your body would want to create more to close up a wound if you got a simple cut, but to have that become infected or for you to generally have an infection, there's going to be a larger demand for them. Diseases and infections bring bacteria and foreign invaders into your body, so you will want more phagocytes and lymphocytes to fight them all off and return back to your health.
The statement Bonds in the hydrogen peroxide are weakened in catalase's active site, allowing the chemical reaction to occur is the answer. Catalase is an enzyme in the liver that breaks down harmful hydrogen peroxide into oxygen and water.