Q.

What does a message mean?

A. it passes all communications from one object to another and are represented by message arrows in sequence diagrams
B. message goes from the sending object’s lifeline to the receiving object’s lifeline
C. it is a rectangle containing an identifier with a dashed line extending below the rectangle
D. all of the mentioned
Answer» A. it passes all communications from one object to another and are represented by message arrows in sequence diagrams
Explanation: all communications from one object to another are called messages and are represented by message arrows in sequence diagrams.
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