Match the Following Terms with Their Correct Definition

Match the following terms with their correct definition. Definition options:
Case clustering

A) Increases and decreases in the frequency of diseases over a period of years or within each year
B) The response of a group of people circumscribed in a place to a common etiologic factor to which they were exposed almost simultaneously
C) An unusual aggregation of health events grouped together in space or time
D) An outbreak that lasts longer than the time span of a single incubation period and is caused by a common source of exposure
E) An outbreak due to exposure of a group of persons to the same noxious influence.