Final answer:
The fused sentence can be fixed using the coordinating conjunction 'but'.
Step-by-step explanation:
The fused sentence "My teacher said my assignment was better I still got a B" can be fixed using the coordinating conjunction "but". So the corrected sentence would be: My teacher said my assignment was better, but I still got a B. This conjunction helps to connect two independent clauses, indicating a contrast between the teacher's evaluation and the student's final grade.
Learn more about Fused sentence