Hello! Let's see...
Question 1: b.
Question 2: b.
Question 3: a. (but c. would be my second choice, if it matters)
I was really torn on the first question; they were both things "happening", and you got to see the consequences/results of things that nobody really started. It made me think of Majora's Mask, where you could just follow people around and see their lives.
I'm probably the only person that would vote Single Player, but I just have found that people being kind of dumb kind of kills the mood for exploration.