Which of the following instructions should be privileged:a. set the value of a timerb. read the clockc. clear memoryd. issue a trap instructione. turn off interruptsf. modify entries in device-status...

Which of the following instructions should be privileged:a. set the value of a timerb. read the clockc. clear memoryd. issue a trap instructione. turn off interruptsf. modify entries in device-status tableg. switch from user to kernel modeh. access I/O device