Which two statements are true about transitions in a State Model?

Composite states can optionally use boundary transitions but Concurrent states must use them./li>

When a transition crosses the boundary of one or more nested states, the entry or exit actions of those states are executed.

Concurrent states can optionally use boundary transitions but Composite states must use them.

When a transition crosses the boundary of one or more nested states, only exit actions of those states areexecuted./Ii>