Compare the emergence of advanced civilizations in meso and south america with the four early river valley civilizations.

which of the following systems of trade was most widely used in both ancient river civilizations and ancient native american civilizations?

a. bartering
b. the exchange of coined money
c. free exchange
d. international trade

well the lessons we can learn is how quickly our fragile freedoms can be overcome. mccarthy rose to power in 1950 of a tsunami of anti-communist hysteria, brandishing a lost of "known communists" in the state department, and held public trials to enhance his political clout. he had fallen from power but only when his attacks were against the u.s. army broadcast to millions of americans to their homes exposing his indecent persecution of the innocence of people. the senate censured him in december 1954 disgraced and discredited, he had died three years later at the age of 47..i hope my answer has you.. good day to you..

i really really really really really really dont know

hello,

the steamboat is your answer.

it seems like its the only form of transportation on the choices.

john maynrd keynes developed new economic respose to the                           ( b. great depression if the 1930's)