The French Revolution went on for
many bloody years due to political radicalism. The radicalism actually originated
from several parties with different views; some wanted a British style
constitutionalism while others are opposed to the revolution. Among these
parties is the far right Jacobin Club led by Maximilien Robespierre. Amidst the
chaos of subjecting the King to trial, forming the constitution, threat of war
with Austria. The nation was threatened of war by Austria and Prussia if the
king is harmed, which made the king look like a conspirator. Threats of war
made prices rise, and so the poor and the working poor sided with the most
radical party, the Jacobins. The king was executed, and the Jacobins went into
overdrive in eradicating anything that is counter-revolutionary.
They were all part of Grant's Virginia campaign in 1864, when Union forces invaded Virginia with the objective of eventually capturing capturing Richmond,the Confederate capital.
The correct answer is B) The power to ratify changes to the Constitution.
The federal government is given the ability to tax citizens multiple times. This includes Article 1 Section 8 of the US Constitution and the 16th amendment (which establishes the federal income tax).
The power to regulate interstate commerce is also in Article 1 Section 8 of the US Constitution. This was further reinforced by the Supreme Court case Gibbons vs. Ogden.
The US Constitution also explicitly gives the right to sign treaties to the federal government.
This is why B can be the only correct answer.