D. Swimming
A gerund is a verb that's used as a noun.
Answer:
assuming you got 100% on every other assignment your grade would be a maximum of 60% or a D. now assume you didn't ace every other assignment it can range anywhere for 0%-60% making your only 2 possible grades F or D. also 40% is not a point of an assignment, it is the weight percentage. so it is 40% of your total grade.
