The distance is : 4117 km
Even though you didn't give us the fragment with the comma slice, it isn't really necessary here as we can answer just based on these 4 options here. All options apart from the second one are correct - only the second option doesn't fix the mistake of the comma splice, whereas the other options do but connecting the sentences properly.
nonviolent resistance is an important tool in the fight for positive change.
I think
A persuasive speech on a school rule, or a thing you want, or for school to allow phones during lunch or something like that.
Number 1 on part II was correct before you put the comma in. Number 6 should be "The clubhouse door would not open, so the player was soaking wet."