Which of the Following Contributes to the Virulence of a Pathogen

Multiple Choice

Which of the following contributes to the virulence of a pathogen?

A) numbers of microorganisms that gain access to a host
B) evasion of host defenses
C) toxin production
D) numbers of microorganisms that gain access to a host and evasion of host defenses
E) numbers of microorganisms that gain access to a host,evasion of host defenses,and toxin production