The law that regulates calling hours and collections methods is

A chronic cough is one that lasts for ________ week(s)

A) 1 or more B) 2 or more C) 3 or less D) 3 or more

What occurs when the body's need for oxygen exceeds the available oxygen supply?

A) Anaerobic metabolism B) Hypoxia C) Cyanosis D) All of the above