Brandon came down with viral pneumonia. His body's immune system will produce to defend him against the infection.
A. corticosteroids
B. lymphocytes
C. adrenaline and noradrenaline
D. catecholamines

Brandon came down with viral pneumonia. His body's immune system will produce B. lymphocytes to defend him against the infection.

Explanation:

Lymphocyte counts below the normal range can also be temporary. They can occur after a cold or another infection, or be caused by intense physical exercise, severe stress, or malnutrition. High lymphocyte blood levels indicate your body is dealing with an infection or other inflammatory condition.T lymphocytes are cells that are programmed to recognize, respond to and remember antigens. T lymphocytes (or T cells) contribute to the immune defenses in two major ways. Some direct and regulate the immune responses.Lymphocyte levels can change according to a person's race, gender, location, and lifestyle habits. A temporarily high lymphocyte count is a normal effect of your body's immune system working. Sometimes, lymphocyte levels are elevated because of a serious condition, like leukemia.A low level can also be a sign of a condition known as lymphocytopenia or lymphopenia.

The answer is reflection.