Which of the following statements about SWF are true? Choose 3 answers.

A.
SWF tasks are assigned once and never duplicated

B.
SWF requires an S3 bucket for workflow storage

C.
SWF workflow executions can last up to a year

D.
SWF triggers SNS notifications on task assignment

E.
SWF uses deciders and workers to complete tasks

F.
SWF requires at least 1 EC2 instance per domain