D uses a gerund as the subject. It uses “traveling” as the noun. Since traveling is a verb used as a noun in this case, it is a gerund
I'd say the correct answer is B) the fallen leaves, which represent mortality.
We will be using the transitional word "but".
To complete the sentence:
Benjamin Franklin was practically penniless when he arrived in Philadelphia, but he was able to buy some rolls.
Quick trivia:
In early America, running away was illegal. Runaways did not fit anywhere and people had to have a place in society. That did not stop Benjamin, instead, he rode a boat to New York in hope to find work as a printer. He didn't continue and walked to New Jersey, finally arriving in Philadelphia via boat ride.
Oh sorry but this isnt english so i cant help with this u shouldnt have clicked history