Answer:
B. a decrease in the number of pathogens in the body
Explanation:
White blood cell includes immune cell like monocytes, macrophages, neutrophils, basophils, eosinophils, etc. These cells are responsible for fighting with the pathogens or foreign molecules and eliminate them from the body.
So when any pathogens get enter in the body these cell kills those pathogen and protect us from them. Therefore the decrease in the number of pathogens in the body is a direct indication that the white blood cells in the body are working. So the right answer is B.
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Hierachy is a series of ordered groupings
<h2>Medicinal chemistry refers to a stimulating branch as it associates various scientific disciplines and permits for collaboration with other scientists.</h2><h2>in developing and researching novel drugs. The medicinal chemists utilize their chemistry training to the procedure of producing new pharmaceuticals. </h2><h2>the assignments of Dorothy is to formulate and develop new medicines, so that it can be later sold in the market. </h2>