The last sentence- furthermore, city......
Is this a riddle, if so, my answer is Racecar.
I think thew answer is D. "The author supplies the rubuttel that quotes more current research". I'm not 100% sure but it was the best one i could think of. Hope it's right
Answer: I think it is this one the: plague still worried people as winter
Explanation: Because it stated that in the passage it left helplessness and Thomas Jefferson is technically a person.