I believe the answer is: B. because his scientific endeavours in electricity were noteworthy.
King Louis was only in his early twenty's at that time. Because of many of Franklin's work in electricity field, he became very popular in French and King Louis wanted to meet him in order to discuss the application of electricity in French, and even willing to pay Franklin with a huge amount of money for it.
Russia's defeat of France was the turning point in the Napoleonic Wars because it shook the reputation of Napoleon and weakened the hegemony of French in Europe. This war showed that Napoleon could be defeated and was not invincible. The strength of the french army under Napoleon decreased by a huge margin.
If the speaker is using the pronoun "I," that means they must be telling the story in the first person. They appear in the story and tell it from their own point of view.
I think it was about $150 k
Is there a passage to go with this question? So we can have better understanding of what we should be looking for. But for a good guess, I’ll say the third one.