Read this sentence:
I have to complete my assignment I can’t go to the movies tonight.
Which option fixes this fused sentence error?
A.
I have to complete my assignment, I can’t go to the movies tonight.
B.
I have to complete my assignment and I can’t go to the movies tonight.
C.
I have to complete my assignment, so I can't go to the movies tonight.
The sentence is a run-on sentence which can easily be fixed by adding a coordinating conjunction (for, and, nor, but, or, yet, so) and adding a comma to separate the two independent sentences.