How do you get access To The advance server in Mobile legends

To enter the Advanced Server, please follow the below instructions: Tap into the Profile section and click Account Settings. Tap on the Switch Server button on the bottom right of the screen. This will allow the player to switch between the Original Server and Advanced Server.

Explanation: I play Mobile legends a lot so I know this

answer; i believe the correct answer is (a) all trenches must have access/egress;