Which of the Following Statements Most Accurately Describes Actinobacteria

Which of the following statements most accurately describes Actinobacteria?

A) Most have an acid-fast property associated with unusual cell wall lipids that also protect them from host defenses and antibiotics.
B) All Actinobacteria are considered to be pathogens in humans or other animals.
C) Most Actinobacteria are nonpathogenic in humans, but cause serious diseases in other animals.
D) Many Actinobacteria produce endospores that allow them to survive for thousands of years.