Which of the following is a pure substance containing three elements that are chemically combined?

Knowing if a patient has tuberculosis, hepatitis b, or aids is important because a. serious illnesses should be avoided. b. they could compromise the vital sign readings. c. cross-infection may occur. d. they can't be cured.

Iwill mark you brainlest if you answer this question

What’s the first step in handling stress? list eight strategies for managing stress. what are some physical symptoms of stress?