Your web application uses a simple architecture in which servlets handle requests and then forward to aJSP using a request dispatcher. You need to pass information calculated in the servlet to the JSP for view generation.This information must NOT be accessible to any other servlet，JSP or session in the webapp. Which two techniques can you use to accomplish this goal？（）
- AAdd attributes to the session object.
- BAdd attributes on the request object.
- CAdd parameters to the request object.
- DUse the pageContext object to add request attributes.
- EAdd parameters to the JSP’s URL when generating the request dispatcher.