Japan was on a quest for power so they dicided to attack neighboring countires
I suggest you to go with first one a. there was heavy damage only within a mile of the bomb's impact. There're no closer description than that.
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.