An Instructor Is Explaining Various Types of Infections

An instructor is explaining various types of infections. A student demonstrates understanding by saying:

A) "An infection that is acquired while the patient is being cared for in a health-care setting is known as a health-care-associated infection."
B) "If a person has an infection in just one area of the body, it is described as a primary infection."
C) "If a second infection is caused by a different pathogen, it becomes a systemic infection."
D) "If an infection spreads from the lungs to other organs, it becomes a secondary infection."