Which of the below action $/$ s exemplify Clear Desk and Clear Screen policy?

a $.$ ?Locking your system when you are away from your desk

b $.$ ?Leaving confidential $/$ sensitive data on your desk, in your absence

c $.$ ?Erasing information from the whiteboard once your meeting $/$ discussion is over

d $.$ ?Noting down passwords on sticky notes or on paper

e $.$ ?a and c