Which two patterns, taken independently, provide a solution for this problem?

A developer is designing a multi-tier web application and discovers a need to log each incoming
client request. Which two patterns, taken independently, provide a solution for this problem?
(Choose two.)

A.
Transfer Object

B.
Service Locator

C.
Front Controller

D.
Intercepting Filter

E.
Business Delegate

F.
Model-View-Controller

Explanation: