A “drone” is: A. A helicopter with four propellers.

B. Any vehicle used on a seek-and-destroy mission.

C. Any experimental test vehicle.

D. An unmanned aircraft.

Which of these is a benefit of using objects in a powerpoint presentation? a. collaborators can create the external files while you create and edit the slide show. b. you can easily change the theme and design of the presentation. c. you can have older data in the source file while having up-to-date data in the presentation. d. collaborators can easily share the presentation.