AnewDisasterRecoverysitehasbeenestablishedusingMetroMirrortoholdsynchronousdataatbothsites.AftertheMetroMirrorisstarted，oneofthemostimportantapplications，aDB2database，slowsdown.AnanalysisshowsthattheI/Orate（especiallywriteI/Os）islessthan40%comparedtotheformerrates.Whatisthebestexplanationforthisbehavior（）A.thebandwidthofthePPRCconnectionbetweenthetwositesistoosmallB.theDS8000SFIattheremotesitewasshippedwithslowerdisksC.I/Oratesvary，dependingonthedistancebetweenthetwositesandtheratescannotbechangedeasily，duetolatencyD.theDB2databasedoesnotworkwithMetroMirrorwithoutanadditionallicense
AnewDisasterRecoverysitehasbeenestablishedusingMetroMirrortoholdsynchronousdataatbothsites.AftertheMetroMirrorisstarted，oneofthemostimportantapplications，aDB2database，slowsdown.AnanalysisshowsthattheI/Orate（especiallywriteI/Os）islessthan40%comparedtotheformerrates.Whatisthebestexplanationforthisbehavior（）
A.thebandwidthofthePPRCconnectionbetweenthetwositesistoosmall
B.theDS8000SFIattheremotesitewasshippedwithslowerdisks
C.I/Oratesvary，dependingonthedistancebetweenthetwositesandtheratescannotbechangedeasily，duetolatency
D.theDB2databasedoesnotworkwithMetroMirrorwithoutanadditionallicense