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AwebbrowserneedNOTalwaysperformacompleterequestforaparticularpagethatitsuspectsmightNOThavechanged.TheHTTPspecificationprovidesamechanismforthebrowsertoretrieveonlyapartialresponsefromthewebserver;thisresponseincludesinformation,suchastheLast-ModifieddatebutNOTthebodyofthepage.WhichHTTPmethodwillthebrowserusetoretrievesuchapartialresponse?()
A.GET
B.ASK
C.SEND
D.HEAD
E.TRACE
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