The ________ required CMS to revalidate all existing 1.5 million Medicare suppliers and providers under new risk-based screening requirements.

Which of the following statements regarding TB is correct?

A) A surgical mask should be worn when caring for any patient with TB. B) N95 respirators do not provide protection against TB as once thought. C) The number of patients with TB has been declining over the last 5 years. D) It is one of the most common diseases contracted by breathing in germs.

"B" represents a(n) _______________-thickness burn. 

Fill in the blank(s) with the appropriate word(s).