Yes
(explanation: i really just needed to answer a question, so thank you)
The correct answer among the choices given is option A. Erythropoietin is the performance-enhancing drugs has the side effect of thickening of the blood. It is present in our body at certain levels because it promotes the production of red blood cells. It i used to treat anemia resulting from kidney failure or cancer treatment.
Some examples are the mouth, nose, eyes, lungs, stomach, and the trachea.
