Youworkasanetworkexchangeadministratoratexamways.com.theexamways.comnetwork
currentlyconsistsofasingleactivedirectoryforestcontainingasingledomainnamedcompany.com.boththeforestandthedomainoperateatthewindowsserver2003functionallevel.thecompany.comorganizationcurrentlymakesuseofmicrosoftexchangeserver2003servicepack2（sp2）astheirmessagingsolution.duringthecourseofthebusinessweekyoureceiveinstructionfromcompany.comtomigratethemessagingsystemtoexchangeserver2010whilstpreparingtheactivedirectoryenvironmentforthedeploymentofmicrosoftexchangeserver2010.
whatshouldyoudofirst？（）
参考答案：C
