When you register an activity in Amazon SWF, you provide the following information, except:

A.
a name

B.
timeout values

C.
a domain

D.
version

Explanation:
When designing an Amazon SWF workflow, you precisely define each of the required activities. You then register each
activity with Amazon SWF as an activity type. When you register the activity, you provide information such as a name
and version, and some timeout values based on how long you expect the activity to take.
http://docs.aws.amazon.com/amazonswf/latest/developerguide/swf-dg-intro-to-swf.html