Read the following run-on sentence:
Marsha is having trouble focusing on her ENG002 videos she moves away to a computer not next to anyone else.
Which one of the following sentences correctly fixes the run-on sentence error found in the sentence above?
Marsha is having trouble focusing; on her ENG002 videos she moves away to a computer not next to anyone else.
Marsha is having trouble focusing on her ENG002 videos but she moves away to a computer not next to anyone else.
Marsha is having trouble focusing on her ENG002 videos, so she moves away to a computer away from everyone.
Marsha is having trouble focusing on her ENG002 videos: she moves away to a computer not next to anyone else.