One difference of economic development between northern and southern U. S. states during the early nineteenth century was — the growth of ship-building industries in the South

the support of international tariffs by the South

the decline of entrepreneurial innovations in the North

the growth of the factory system in the North

The picture below shows president richard nixon and the first lady standing before the great wall of china in 1972. they are smiling - as are the chinese with them. when this picture was shown on american television, americans were aware that it was a historic moment. what are two reasons why this moment was important for both china and the united states?