Answer:
B but see below.
Explanation:
The first word begins a bunch of parallel phrases that explains what a more perfect Union is.
it is to establish justice
insure peace between states (Domestic Tranquility
Provide for common defence
promote general welfare
secure the blessings of Liberty.
When you look at these things that is the common thread that runs through a more perfect union.
This is one of those questions where it does all of the choices. If you were writing an essay, all of the choices would come into what you wrote.
But which of them is the best answer? I think B is probably the answer you might consider. I choose that because the last phrase is to secure the blessings of Liberty.
Blessings and Liberty are pretty strong words. It does not say freedom exactly, but it means Liberty. If you ask people in the street, or even your own family what the meaning of "the Blessings of Liberty." they might give you a strange look, but certainly they would mention freedom somewhere in their answer.