How is a Soft Body different from a Rigid Body?

How is a Soft Body different from a Rigid Body?
A . Afield can’t be connected to Soft Body particles.
B . Rigid Bodies can’t be affected by a Dynamic constraint.
C . A Soft Body can be keyframed using the Set Active Key command.
D . Rigid Bodies don’t deform.

Answer: D

Explanation:

Reference: http://www.autodesk.com/us/maya/2011help/index.html?url=./files/Viewing_the_scene_Usi ng_the_ViewCube.htm,topicNumber=d0e70082