YouworkasanapplicationdeveloperatCer-Tech.com.YouareintheprocessofcreatinganapplicationforCert-Tech.com’sHumanResourcesdepartmentthattracksemployeebenefitsYouhavetostorecurrentemployeedatawithoutrecompilingtheapplication.Youelecttostorethisemployeedataasacustomsectionintheapplicationconfigurationfile.Therelevantportionoftheapplicationconfigurationfileisshowninthefollowingexhibit：Whatshouldyoudo？（）

A.CreateacustomsectionhandlerclassthatinheritstheConfigurationSectioninterface B.AddasectionelementtotheEmployeeSectionelementoftheapplicationconfigurationfile C.CreateacustomsectionhandlerclassthatimplementstheIConfigurationSectionHandlerinterface. D.AddanEmployeeSectionelementtotheconfigSectionselementoftheapplicationconfgurationfile E.CreateacustomsectionhandlerclassthatimplementstheIApplicationSettingsProviderinterface F.AddasectionelementtotheconfigSectionselementoftheapplicationconfigurationfile