Which of the Following Is (Are)characteristics of Nonspecific, Innate Immunity

Multiple Choice

Which of the following is (are) characteristics of nonspecific, innate immunity?

A) Only needs to recognize agent as "non- self" to react.
B) Responds to all challenges equally.
C) Has no "memory." It does not react differently when reexposed to the same agent.
D) Reacts without prior exposure to the agent.
E) All of the above.