What are two circumstances for which it may be advisable to use the silent uninstallation method instead of an interactive method？（）

A. The Administrator is unable to successfully export DISPLAY to a remote server.
B. IBM Tivoli Workload Scheduler is installed on a server for which there is no console access.
C. DNS is not working properly and the server cannot be accessed remotely to run the uninstallation script.
D. TCP on the server on which IBM Tivoli Workload Scheduler is installed is configured for half-duplex rather than full-duplex.
E. The remote IBM Tivoli Workload Scheduler server is multi-homed， thus the return connection to IBM Tivoli Workload Scheduler cannot be established thereby requiring the use of the silent uninstaller.