Which two are best practices when it comes to component and application event handling? (Choose two.)

Which two are best practices when it comes to component and application event handling? (Choose two.)
A . Reuse the event logic in a component bundle, by putting the logic in the helper.
B . Use component events to communicate actions that should be handled at the application level.
C . Handle low-level events in the event handler and re-fire them as higher-level events.
D . Try to use application events as opposed to component events.

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Answer: A, C