You need to create a Web Part that displays all of the permission levels of the current subsite.
Which collection should you use?
A.
SPContext.Current.Web.Permissions
B.
SPContext.Current.Web.Properties
C.
SPContext.Current.Web.RoleAssignments
D.
SPContext.Current.Web.RoleDefinitions
Explanation:
MNEMONIC RULE: “permission levels = RoleDefinitions”The role definition, or permission level, is the list of rights associated with the role.
Role Assignments, Role Definitions, and Inheritance
http://msdn.microsoft.com/en-us/library/ms414036.aspx