Erythropoietin is a hormone that:

A) creates lymph fluid.
B) regulates the production of white blood cells.
C) stimulates the production of red blood cells.
D) monitors the lymph nodes.

Erythropoietin

A hormone produced by the kidneys that promotes the formation of red blood cells by the bone marrow.

Lymph Nodes

Small, bean-shaped structures that filter lymphatic fluid and trap pathogens and foreign particles as part of the immune system.