Question

how does an increased erythrocyte level benefit an athlete? by increasing the ability of the body to fight infection by decreasing viscosity of the blood by increasing the oxygen carrying capacity of the blood by decreasing the capacity of the blood to clot in case of an injury

Explanation:

Erythrocytes, or red - blood cells, are responsible for transporting oxygen. An increased level means more oxygen can be carried to the muscles, which is beneficial for athletes.

Answer:

By increasing the oxygen carrying capacity of the blood