A state machine diagram is used to document the states and transitions of  _______.​Question 2Select one:a.a business process.b.a use case.c.a message.d.an object.

The correct answer is d. an object. A state machine diagram in UML (Unified Modeling Language) is used to document the states and transitions of an object. It describes how an object goes through different states or conditions in its life cycle, and how it responds to events that cause it to transition from one state to another.