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C. Kelsey has 5/8 feet more rope
Since Jen has 2 ropes, we would need to add their amounts, which result in 34 7/8 feet. Kesley has 35 1/2 feet rope, so that we already can see that Kesley has longer rope and by substracting those two amounts we can see that difference is 5/8 feet. And answer C is going to fit in here.