What is dual IOS mode on the Cisco ASR 1001 Router?
A. redundant IOS processes that are running on the active RP and standby RP
B. active and standby IOS processes that are running on a single RP
C. separate Cisco IOS XE and IOS XR processes that are running on a single RP
D. separate Cisco IOS XE and IOS XR processes that are running on two different RPs
E. checkpointed redundant IOS processes that are running on two different RPs in active/active mode
