You are creating a Web Part in SharePoint Server 2010.

You need to ensure that the Web Part can send data to another Web Part.

Which interface should you override?

A.
IQueryable

B.
ISerializable

C.
IWebEditable

D.
IWebPartField

Explanation:
MNEMONIC RULE: “Web Part send data = IWebPartField”

Defines a provider interface for connecting two server controls using a single field of data.

This interface is designed to be used with Web Parts connections. In a Web Parts connection, two server controls that reside in a WebPartZoneBase zone establish a connection and share data, with one control acting as the consumer and the other control acting as a provider.

IWebPartField Interface
http://msdn.microsoft.com/en-us/library/system.web.ui.webcontrols.webparts.iwebpartfield.aspx