You are studying for your final exam of the semester. Up to this point, you received 3 exam scores of 96%, 77%, and 74%. To receive a grade B in the class, you must have an average exam score between 80% and 89% for all 4 exams including the final.

Find the widest range of scores that you can get on the final exam in order to receive a grade of B for the class. Use interval notation.

A. [67, 100]
B. [73, 100]
C. [70, 71]