You plan to give an on-site presentation. The external display available for your audience is a 42-inch flat panel monitor. You need to ensure that the presentation on the monitor of your computer is duplicated on the external monitor for the audience.<br /> What should you do?()<br /> <img src="https://nimg.ppkao.com/2018-07/gelingxia/201807311608053283.jpg?sign=e12e41dc2ac6ff26f2730276e81eea07&t=62d39b1b" />
A、A
B、B
C、C
D、D