YouareimplementinganASP.NETWebsitethatusesacustomservercontrolnamedTask.Taskisdefinedasshowninthefollowinglist.Classname：TaskNamespace：DevControlsAssembly：TestServerControl.dllBaseclass：System.Web.UI.WebControls.WebControlYoucopyTestServerControl.dlltothe

YouareimplementinganASP.NETWebsitethatusesacustomservercontrolnamedTask.Taskisdefinedasshowninthefollowinglist.Classname：TaskNamespace：DevControlsAssembly：TestServerControl.dllBaseclass：System.Web.UI.WebControls.WebControlYoucopyTestServerControl.dlltotheWebsite?sBinfolder.YouneedtoallowtheTaskcontroltobedeclarativelyusedonsitepagesthatdonotcontainanexplicit@Registerdirective.Whichconfigurationshouldyouaddtotheweb.configfile？（）

A.<appSettings><addkey="Dev:Task"value="DevControls,DevControls.Task"/> </appSettings>

B.<compilationtargetFramework="4.0"explicit="false"><assemblies><add assembly="TestServerControl"/></assemblies></compilation>

C.<pages><controls><addassembly="TestServerControl"namespace="DevControls"tagPrefix="Dev"/></controls></pages>

D.<pages><tagMapping><addtagType="System.Web.UI.WebControls.WebControl" mappedTagType="DevControls</tagMapping></pages>