Answer:
By studying his thoughts
He could think something but not show it in any way, therefore thoughts
Answer:
d cuz it looks reasonable
My best guess for this question is to find good topic to talk about, and if your topic is too broad it may be hard to find information. So if your topic is too broad you have to do a lot of research, and find information that you thought made sense.
Online contact can hurt emotionally personal contact can hurt physically
