What constraint applies to a stop in a UML interaction diagram?

Question

Options

• AOnly one stop may occur in one interaction.
• BNo other event occurrences may appear below a stop on a given lifeline in a simple interaction.
• CIf there is a stop on one lifeline, there should be stops on all other lifelines within an interaction.
• DIf one lifeline has a stop in one interaction, it should have stops in every interaction that it

• A
  10% (4)
• B
  85% (33)
• C
  3% (1)
• D
  3% (1)

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