Nextair Corporation. has limited hardware resources available and is planning to perform an in-place upgrade of BlackBerry Enterprise Server software version 4.1.6 to version 5.0. What are two disadvantages of this approach? (Choose two) | Blackberry

A. All other locations with 4.1.6 BlackBerry Enterprise Servers must be upgraded immediately
B. It will be more difficult to rollback
C. There is additional cost of another SRP
D. The SQL database must be hosted on two separate BlackBerry Enterprise Servers
E. They will experience more downtime

Answer: B,E