Which of the following statements are TRUE about Privileged Instructions?

(A) It can only be executed by the Operating System kernel and not by user applications.

(B) It is designed to perform operations that can directly affect the hardware or system state such as I/O operations or changing memory management setting.

(C) User applications can execute privileged instructions if they have correct permissions, set by the Operating System.

(D) It is usually executed in user mode to ensure the safety and security of the system.

Choose the correct answer from the options given below :