Which Ming building project helped develop agriculture? O canals
O pagodas
O temples
defense walls

QUICK I GOT 20 mins!!
100 pts

How did europeans and the introduction of european goods and ideas change native life ?

How did the united states respond when north vietnam attacked a us warship and sent troops to south vietnam in the early 1960s? a.the united states declined to assist south vietnam against the north. b.us leaders authorized south vietnam to invade north vietnam. c.the president did not sign the gulf of tonkin resolution. d.congress authorized the president to escalate the conflict.

The law of increasing costs states that as a country produces less of one product and more of another, there is an increase in the resources needed to expand production of the second product.