A developer works for a software vendor that specializes in making customizable software for companies in
the insurance business to communicate with health care providers. The vendor wants to allow their clients
to customize a set of Web services to change and alter the types of information that gets passed on Web
services requests. Therefore, there is a requirement for real-time dynamic processing of metadata to drive
Web service requests.
The developer needs to build a Web service than can respond with the needed flexibility for changing the
interface.
Which type of client best accomplishes the objective?

A.
Static clients

B.
Dispatch clients

C.
Dynamic proxy polling clients

D.
Dynamic proxy callback clients