A.The state of the system

B.The flow of control between activities

C.The allocation of resources

D.The flow of data between blocks

A.A requirement relationship

B.A behavior flow

C.An interaction point where a block can communicate with its environment or other blocks

D.A part of the internal block structure

A.Generalization relationships between blocks

B.Requirements

C.Interfaces

D.Parts of the system

A.As use cases

B.As blocks

C.As activities

D.As stereotyped elements with a "requirement" stereotype

A.Identifying system constraints and functionalities

B.Validating and verifying system specifications

C.Capturing stakeholder needs and requirements

D.Specifying project scope and boundaries