What is an efficient way to represent highly reused patterns of interaction on sequence diagrams?

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What is an efficient way to represent highly reused patterns of interaction on sequence diagrams?
A . an Interaction use referencing an interaction defined on a separate sequence diagram
B. an interaction template construct that is instantiated from the referring sequence diagram
C. the call interaction operator with an operand referring to the reusable Interaction defined elsewhere
D. an activation on the referring sequence diagram allocated to another activation on the referenced diagram

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Answer: B