which is part of the Oracle Fusion Middleware environment?

After installation, which is part of the Oracle Fusion Middleware environment?

A.
WebLogic Domain, MetaData Repository, and System Components (such as OHS, Web Cache

B.
WebLogic Domain, OC4J instance, and APACHE

C.
OC4J instance, APACHE, and JVM

D.
OC4J, OHS, and MetaData Repository