The answer is A, "It allows you to join a group as a member or to create your own group."
Silly question! Of course you have to shutdown because you can ruin some components. Also you can block the CPU fan, CPU is very hot like the computer internals.
Answer:
what is this i don't understand
The web server logs what files were served, to which address and when they were served. It also logs errors (in a separate file). The admin has to piece together the logs to follow a user's actions.
