Which command will prevent a group policy from inheriting a filter ACL in a clientless SSL VPN?

The answear is A.

Correct is C

http://www.cisco.com/c/en/us/td/docs/security/asa/asa80/configuration/guide/conf_gd/vpngrp.html

and

http://www.cisco.com/c/en/us/td/docs/security/asa/asa95/configuration/vpn/asa-95-vpn-config/webvpn-configure-policy-groups.html

Specify the ACL for Clientless SSL VPN Sessions

Specify the name of the ACL to use for clientless SSL VPN sessions for this group policy or username by using the filter command in webvpn mode. Clientless SSL VPN ACLs do not apply until you enter the filter command to specify them.

To remove the ACL, including a null value created by issuing the
filter none command, enter the no form of this command. The no option allows inheritance of a value from another group policy. To prevent inheriting filter values, enter the filter value none command.