Which feature/offering of Oracle Application Grid makes it particularly easy to significantly increase the performance of Web-based applications with no code change ？ （）

A. WLDF has better performance than OEM 
B. my organization already has a solution for unified management and monitoring； we need to supplement that with some specific WLS-related capabilities
C. OEM is not certified with latest version of WLS
D. OEM is really focused on the database tier， is not meant to address JEE management and monitoring

A. it provides enhanced visibility across the entire application infrastructure 
B. it provides a set of management tools that enable automation of configuraion
C. it significantly increases the performance of Web-based applications with no code change
D. it dramatically reduces costs associated with diagnostics， configuration， and deployment on production servers 

A. Grid Control allows administrative changes to be made to WebLogic domain
B. Grid Control enables multi-domain monitoring and management of WebLogic Server 
C. Grid Control provides service/system dashbord， and topology views for WebLogic Domains 
D. Grid Control allows creating and configuring WebLogic Domains