Can someone please help me ?

The Article of confederation was the first American Constitution that included 13 states which was completed in 1777 and adopted in 1781 but later replaced by the constitution of the United States in 1789.

Ratification is the confirmation of a previous and unauthorised Act, that may has an effect of placing the Act in the similar position as if it had been initially authorised.For example, in the United States,proposed amendments in the U.S constitution must undergo convection in 3-quarter of the states.

The Full Faith and Credit Clause is the first sentence of the Article IV,section 1 of the U.S Constitution where states are granted the public Acts,Records and judicial proceedings of every other states.It ensures that the states are common,legal equal in union and respect/honor the law orders given by other state government.

The Shay's Rebellion of 1786 were several attacks on government properties and courthouses in Massachusetts that resulted into military confrontation in 1787.One of the major outcome of the event was the formation of a strong central government.

There were some policies where in the balance of slave and Free State was kept.  A good example of this was the Missouri Compromise.  However, When the Kansas Nebraska Act came it threatened that balance since states can now decide among themselves. Eventually it took the American Civil War to end slavery in the United States.

A is the correct answer.

The correct answer to this open question is the following.

The two conflicts that led to progress and industrial power were wars. Yes, the War of 1812 and the American Civil War.

We condemn war, but it has been to the new inventions on the battlefield that progress has reached the industry and has benefited society. New machines and technology used in the war, later was used or adapted to improve the manufacturing processes in the factories of the United States.