I believe the answer is most definitely A and if not that it is B, the other two I know for sure are wrong, hope this helps!!
The six purposes of the Constitution found in the Preamble are: 1) form a more perfect union. 2) establish Justice. 3) insure domestic tranquility. 4) provide for common defense. 5) promote the general welfare. 6) secure the blessings of liberty to ourselves and our posterity.
