Which of the following are run-on sentences?

l. I went to the gym later I went to the theater and Sally went to the store.

II. Sally went to the store I went to the theater first and then the gym.

III. Sally and I did different things I went to the gym she went to the store later I went to the gym.

A. I, II, and III
B. I and II only
C. II and III only
D. I only

i’m writing a memoir and i’ve been given the great suggestion of placing a ‘sub-narrative’ within some of the chapters – sort of, what was going on with me in the grand scheme of things.

i was wondering how to format this so that it is very obvious we are stepping out the of story.

firstly is a change in font from serif to sans workable? i also use dashes for a scene change. was thinking of using a different scene-changer too.

here’s a (shortened) example:

university – or what’s known as ‘uni’ in australia – were some of the best days of my life. where else do you get to potter around in a great location, have very little responsibility, learn lots of things, do lots of things and walk out four years later with a bonus – a degree!

with my university years i had immersed myself into community of intelligent ambitious people. generally everyone had a confidence about themselves. they knew where they were going in life and weren’t threatened by others.

—–

next normal paragraph continues here…

(sorry couldn’t show the fonts in this comment field)

too much?

what are the options?