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The rise of the Kingdom of Kongo was that many people got attracted to Kongo because of the rich gold mines at Sofala. Also, they have been pushing intermarriage with the African people to gain favor and pushing farther into the interior of Africa. Aside from that people also developed skills like weaving, pottery, blacksmithing, and carving which have also contributed to their economy. Also, the agriculture was a big part in Kongo.
Article V of the Constitution provides two ways to propose amendments to the document. Amendments may be proposed either by the Congress, through a joint resolution passed by a two-thirds vote, or by a convention called by Congress in response to applications from two-thirds of the state legislatures.
A two-thirds vote in both houses of the U.S. Congress. Ratified by three-fourths of the state legislatures.
A two-thirds vote in both houses of U.S. Congress. ...
A national constitutional convention called by two-thirds of the state legislatures.
If the president doesn't sign the bill but holds it for more than 10 days : A. It becomes law.
The only thing that would prevent this occurrence is if by any chance, the congress is not in session to accept the returned bill. Beside that, it will automatically becomes law.