Which design pattern is best suited to improving performance?

You are contracted to improve the performance of an application.

—
While analyzing the application, you observe the following issues:
Tight coupling between client and business objects
Too many remote method Invocations between client and server
Which design pattern is best suited to improving performance?

A.
Web Service Broker

B.
Session Façade

C.
Value List Handler

D.
Data Access Object

E.
Service Activator

Explanation:
http://www.oracle.com/technetwork/java/sessionfacade-141285.html (see the problem
and then the solution)