Regarding Amazon SWF, the coordination logic in a workflow is contained in a software program called a ____.

A.
Handler

B.
Decider

C.
Cordinator

D.
Worker

Explanation:
In Amazon SWF, the coordination logic in a workflow is contained in a software program called a decider. The decider
schedules activity tasks, provides input data to the activity workers, processes events that arrive while the workflow is in
progress, and ultimately ends (or closes) the workflow when the objective has been completed.

http://docs.aws.amazon.com/amazonswf/latest/developerguide/swf-dg-intro-to-swf.html