Which the two are concerning the objects available to developers creating tag files？（）

• A、 The session object must be declared explicity.
• B、 The request and response objects are available implicity.
• C、 The output stream is available through the implicit outStream object.
• D、 The servlet context is available through the implicit servletContext object.
• E、 The JspContext for the tag file is available through the implicit jspContext object.