The Condition Known as Microbial Antagonism May Be Defined as

The condition known as microbial antagonism may be defined as

A) a relationship between two organisms where only one member benefits.
B) a relationship between two organisms where both members benefit.
C) microorganisms that remain with a person throughout life.
D) an unsuccessful microbial invasion due to the presence of preexisting microbes.
E) a relationship between two organisms where one member harms the other.