When configuring IOS firewall （CBAC） operations on Cisco routers， the "inspection rule" could be applied at which two locations？ （）

A. at the untrusted interfacein the inbound direction
B. atthe untrusted interface in theoutbounddirection
C. at thetrusted interface inthe inbound direction
D. at the trusted interface in the outbound direction
E. at the trusted and untrusted interfaces in the inbound direction
F. at the trusted and untrusted interfaces in the outbounddirectio