A primary source would be an eye witness account of the event. Someone who seen it happen.
Congress is in charge of ensuring the soul of the constitution is maintained in the nation and, now and again, revise or change the constitution itself. Keeping in mind the end goal to specialty laws, the authoritative body turns out with two principle reports: bills and resolutions.
Answer:
Constitutional amendments.
Explanation:
The first method authorizes Congress, "whenever two-thirds of both houses shall deem it necessary", to propose Constitutional amendments. ... It moreover equally enables the General and the State Governments to originate the amendment of errors, as they may be pointed out by the experience on one side, or on the other.