Edison invented the light bulb, which has an obvious significance for American culture. They are installed in practically every facility. Bell invented the first practical telephone, which is used by almost every American on a daily basis.
I'm pretty sure it would be C.)Congress votes to increase the income tax, because that relates to stuff inside the nations borders.
The other options deal with stuff outside of the nations borders.
Hope this helps!
At any moment if the president is impeached or dies the Vice President will be the next in line.