Answer:
c. white blood cells increase
Explanation:
White blood cells (WBC) are involved in immune responses of the body against any type of infection. These cells fight the infection by killing the pathogens, stimulating inflammatory responses and /or by the formation of antibodies to kill the antigens. Hence, when an infection occurs, the WBC count of blood increases. Since red blood cells are involved in oxygen and nutrient supply, they have no role in immune responses.
