You are developing a Feature that will be used in multiple languages.

You need to ensure that users view the Feature’s title and description in the display language of their choice.

What should you create?

A.
a Feature event receiver

B.
a site definition

C.
multiple Elements.xml files

D.
multiple Resource (.resx) files

Explanation:
MNEMONIC RULE: “Language Resource”

Using Resource Files (.resx) when developing SharePoint solutions
http://blogs.msdn.com/b/joshuag/archive/2009/03/07/using-resource-files-resx-when-developing-sharepoint-solutions.aspx