Explanation/Reference:
B: Oracle WebCenter (OWC) - provides the foundation for delivering a modern user experience for Oracle Fusion Middleware as well as Oracle Fusion Applications.
OWC is composed of four main components as illustrated in the figure:

D: Oracle Meta Data Services (OMDS) - stores customization, personalization, and other metadata in a repository. The repository can either be stored in a database or in file-based storage.
Incorrect answers:
A: OWCS does not provide reverse proxy.
Oracle WebCenter Services provides a comprehensive set of standards-based social computing components that enrich and modernize existing portals and websites. These social computing services include wikis, blogs, instant messaging and presence, activity streams and graphs, content collaboration and more. Oracle WebCenter Services enables organizations to enhance their existing enterprise portals and websites.
C: Oracle HTTP Server (OHS) - provides a HTTP listener for Oracle WebLogic Server and the framework for hosting static content, dynamic content, and applications over the Web.
E: Oracle WebLogic Suite (OWLS) - fully implements the latest Java EE standards, provides industry leading reliability and performance, and includes comprehensive management capabilities. OWLS can be used to host the Oracle WebCenter products.