Answers move around, so i'm just going to base it off the answer being G0/0. unsure what B is.
ACLs are applied at the Router level, so G0/48 and G0/1 are thrown out.
Flow of traffic is going from User1 to Internet, so G0/0 outgoing is wrong. Similar to existing configuration, incoming for S1/0.
Leaves outgoing for S1/0 and incoming for G0/0. Both will work, but applying the ACL closer to the source is more efficient.
I believe the answer is correct. Int G0/0 in the incoming direction.
ACLs are applied at the Router level, so G0/48 and G0/1 are thrown out.
Flow of traffic is going from User1 to Internet, so G0/0 outgoing is wrong. Similar to existing configuration, incoming for S1/0.
Leaves outgoing for S1/0 and incoming for G0/0. Both will work, but applying the ACL closer to the source is more efficient.
I believe the answer is correct. Int G0/0 in the incoming direction.