To be honest they all are great choices but personally I would suggest answer C.
Hope this helps.
Answer:
Well you can automatically cross out the first three so that leaves D.
Answer:
you can also write "The student plays football for a team"
Explanation:
hope it helps!
I think it is letter c. adding a conjunction between the complete sentences. The other ones can be used on a run on sentence. Letter c. is an example of a bad way to fix a run on.
