Which of the following statements best applies to the term user-defined events?
(A) User-defined events represent specific instances of a user-defined type.
(B) User-defined events are used to communicate changes of properties, errors, and
the progress of lengthy operations.
(C) User-defined events are predefined objects with physical manifestations.
(D) User-defined events are populated with objects that hold data, have properties,
respond to methods, and raise events.
(B) User-defined events are used to communicate changes of properties, errors, and
the progress of lengthy operations.
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Fill in the blank(s) with the appropriate word(s).
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