1. ughhhh not entirely sure but B, 2. again not entirely sure should be B as well and finally 3.is D remember these are not always the answer just most likely what one person thinks
Answer: a profession is a job, or what you do for a living
example : a teacher is an example of proffesion
If you have windows 7 and then change to windows 10, you will see a lot of differences like Microsoft account integration, a new start menu, new apps and a windows store, Cortana and a task view bar, you get edge in windows 10, and most important desktop and security improvements
Hope this helps!
Presentation software is probably his best option. It would allow him to present visual and audio supplements to his audience.