单项选择题 A developer is designing a web application that makes many fine-grained remote data requests for eachclient request. During testing， the developer discovers that the volume of remote requests significantlydegrades performance of the application. Which design pattern provides a solution for this problem？（）

多项选择题 Whichthreearevalidvaluesforthebody-contentattributeofatagdirectiveinatagfile？（）

多项选择题 Given： 6.<myTag：foo bar=’42’> 7.<%="processing" %> 8.</myTag：foo> and a custom tag handler for foo which extends TagSupport. Which two are true about thetag handler referenced by foo？（）