I also believe it is A good luck.
I would also go with D.) Mutually assured destruction.
This whole idea mainly started during the Cold War. The United States and Soviet Union didn't want to use their nuclear weapons because they feared that if they did, the other side would retaliate. Ultimately, both sides would lose everything.
At least seven years:
“No Person shall be a Representative who shall not have attained to the age of twenty five Years, and been seven Years a Citizen of the United States, and who shall not, when elected, be an Inhabitant of that State in which he shall be chosen.”