The Difference Between an Overt and a Covert Bioterrorism Event

The difference between an overt and a covert bioterrorism event is that

A) a covert event is one that is carried out against undercover agents.
B) a covert event is announced and an overt event is not announced.
C) an overt event is announced and a covert event is not announced.
D) an overt event is one that is carried out in the air.

Correct Answer:

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