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Answer:
C
Explanation:
Sometimes the grading scale is ...
A: ≥ 90%
B: ≥ 80%
C: ≥ 70% . . . . . . 75% would be a C grade
D: ≥ 60%
F: < 60%
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I've taken courses where the grading scale was radically different from this. Sometimes, an A was 95% or better; sometimes 60% or better. It depends on the difficulty of the course (or assignment) and the teacher's expectations. Only your grader knows for sure.