What is the difference between a pure event and a sampled event?

A.
Pure events are based on a single attribute; sample events are based on multiple attributes.

B.
Pure events result from unsolicited notifications; sampled events arise from sampling data at regular intervals.

C.
Pure events arise from sampling data at regular intervals; sampled events result from unsolicited notifications.

D.
Pure events are closed when the condition that raised them is no longer true; sample events must be closed manually.

Explanation: