Answer the following question given this paragraph: 

A person can live a normal, healthy life with just one kidney. However, at least one kidney must function properly to maintain life. Diseases that threaten the health and functioning of the kidneys include kidney stones, infections, and diabetes.


Q: Stones, infections, and diabetes threaten the health and functioning of what paired organs?

 Choices:

- tissues

- lungs

- arteries

- kidneys

A:
kidneys
