What Enterprise Manager functionality can you use to monitor non-Oracle components from the Oracle Enterprise Manage console?

What Enterprise Manager functionality can you use to monitor non-Oracle components from the
Oracle Enterprise Manage console?

A.
User exits

B.
Connector Framework

C.
Management plug-ins

D.
Feature not supported by Oracle Enterprise Manager

Explanation:
Enterprise Manager allows you to monitor and manage a variety of components outof-the-box.
The Management Plug-ins allow you to seamlessly monitor and manage non-Oracle components
from the Grid Control console by providing an easy way to specify new classes of components for
Enterprise Manager to monitor.
Reference: OracleEnterprise Manager Concepts