Which of the following is the recommended disposal method for used computers？（）

A.Sealing all potential cold air leaks
B.Installing additional cooling fans
C.Setting the temperature lower
D.Replacing the UPS with a generator

A.Tablet notebooks with LCD monitors
B.Thin clients with LCD monitors
C.Thin clients with CRT monitors
D.Notebook computers with LCD monitors

A.Scaling
B.Copying
C.Duplex
D.Simplex