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.
The “Fifty-four Forty” raises to a line of latitude, an
east-west running line marking a north-south border. This specific line was the
anticipated national boundary between the mounting United States’ Oregon territory
and Canada. During the 1844 presidential campaign, the Democratic Party declared
that the US could claim all land in the Oregon Country north to the 54-40 line
or parallel. The British disputed claims north of the 42nd parallel.
54-40 or fight turn out to be the slogan of the expansionists. Subsequent to the
election, Democratic Pres. James Polk finally led the US to decide to a concession
border at the 49th parallel where the northern boundary survives.
