WDU203cXuất hiện trong 3 đề thi
Because some users learn how to use a system through trial and error, it is important to:
Các lựa chọn
AProvide extensive documentation to ensure that users always do the right thing.
BForce users to undergo training before using a system so they don't break anything.
CProvide users with only one option at a time so that they cannot make mistakes.
DSupport "undo" and "redo" to help users recover from mistakes.