Which three statements accurately describe IOS Firewall configurations？（）

A. The IP inspection rule can be applied in the inbound direction on the secured interface
B. The IP inspection rule can be applied in the outbound direction on the unsecured interface
C. The ACL applied in the inbound direction on the unsecured interface should be an extendedAC
D. For temporary openings to be created dynamically by Cisco IOS Firewall， the access-list for thereturning traffic must be a standard ACL