Which three statements about IOS Firewall configurations are true？（）
- AThe IP inspection rule can be applied in the inbound direction on the secured interface.
- BThe IP inspection rule can be applied in the outbound direction on the unsecured interface.
- CThe ACL applied in the outbound direction on the unsecured interface should be an extended ACL.
- DThe ACL applied in the inbound direction on the unsecured interface should be an extended ACL.
- EFor temporary openings to be created dynamically by Cisco IOS Firewall，the access-list for thereturning traffic must be a standard ACL.
- FFor temporary openings to be created dynamically by Cisco IOS Firewall，the IP inspection rule must be applied to the secured interface.