You?work?as?a?network?Exchange?administrator?at?Company.com.The?Company.com?network?currently?consists?of?a?single?Active?Directory?forest?containing?a?single?domain?named?Company.com.The?Company.com?organization?makes?use?of?Microsoft?Exchange?Server?2000?and?Microsoft?Exchange?Server?2003?Service?Pack?2?（SP2）?as?their?messaging?solution.During?the?course?of?the?business?week?you?receive?instruction?from?Company.com?to?transition?the?Exchange?organization?to?Microsoft?Exchange?Server?2010?whilst?preparing?the?Exchange?organization?for?the?deployment?of?the?Exchange?Server?2010?Hub?Transport?servers，?Client?Access?and?Mailbox?servers.What?should?you?do？（）
A. You?should?consider?having?the?Microsoft?Exchange?Server?2010?Edge?Transport?server?deployed?first.
B. You?should?consider?having?the?Microsoft?Exchange?Server?2000?servers?removed?from?the?organization?first.
C. You?should?consider?having?the?Active?Directory?Connector?（ADC）?installed?first.
D. You?should?consider?having?the?Recipient?Update?service?（RUS）?objects?deleted?first.