A.a constraint of the use case element

B.a constraint of the activity element

C.a guideline from a methodology

D.a constraint defined in SysML

A.an activation on the referring sequence diagram allocated to another activation on the referenced diagram

B.the call interaction operator with an operand referring to the reusable Interaction defined elsewhere

C.an Interaction use referencing an interaction defined on a separate sequence diagram

D.an interaction template construct that is instantiated from the referring sequence diagram

A.Option C

B.Option A

C.Option D

D.Option B

A.an entry behavior

B.the effect of an internal transition

C.an exit behavior

D.a do behavior

A.e1, e2, e6, e7

B.e1, e2, e3, e6, e7, e2

C.e1, e2, e6, e7, e2

D.e1, e2, e6, e7, e1

E.e1, e2, e3, e3, e6, e7, e1, e2