Answer: B.
Explanation: Run on sentences have no stopping points, and usually don't sound proper when you read them aloud. Usually, run on sentences are easy to spot because they have little to no puntuation in an essay or paragraph.
Here are some examples of run on sentences:
- I am usually so tired after my baseball games today im feeling just fine though.
- I wonder what happened to timmy I hope he's okay.
- Ugh! School is so boring I hate my history class when will it end?
It sounds almost as if you're rushing to finish your sentence, or speaking too quickly.