A. The evidence is relevant because it shows that people interacting through technology are often rude.
All would seem appropriate, but I'd say D, since it assists you in gathering data to support your clause
If they ask you about yourself, just start with what qualities you like about yourself.
TIP: Make eye contact and portray a confident appearance, like don't slouch and mumble, speak clear and sit straight, be on time, be prepared, and know what you're saying.
:)