AllofyourJSPsneedtohavealinkthatpermitsuserstoemailthewebmaster.Thiswebapplicationislicensedtomanysmallbusinesses，eachofwhichhaveadifferentemailaddressforthewebmaster.Youhavedecidedtouseacontextparameterthatyouspecifyinthedeploymentdescriptor，likethis：42.
题目
AllofyourJSPsneedtohavealinkthatpermitsuserstoemailthewebmaster.Thiswebapplicationislicensedtomanysmallbusinesses，eachofwhichhaveadifferentemailaddressforthewebmaster.Youhavedecidedtouseacontextparameterthatyouspecifyinthedeploymentdescriptor，likethis：42.<context-param>43.<param-name>webmasterEmail</param-name>44.<param-value>master@example.com</param-value>45.</context-param>WhichJSPcodesnippetcreatesthisemaillink？（）
A.<ahref=’mailto：${contextParam.webmasterEmail}’>contactus</a>
B.<ahref=’mailto：${applicationScope.webmasterEmail}’>contactus</a>
C.<ahref=’mailto：${contextInitParam.webmasterEmail}’>contactus</a>
D.<ahref=’mailto：${initParam.webmasterEmail}’>contactus</a>