What best describes the semantics modeled by the exhibit?

What best describes the semantics modeled by the exhibit?

A . The Order Entity component is part of the internals of the Invoicer component.
B . The Invoicer has a complex connector that connects the Generate Invoice interface with the Order interface.
C . This is an illegal diagram.
D . The Invoicer has a complex port that provides the interface Generate Invoice and requires the interface Order.

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Answer: D