Which of these inventions resulted in southern farmers buying slaves in record numbers?
a. cotton gin
b. cotton mill
c. assembly line
d. spinning jenny

How did the iran-contra affair impact the conflict between the united states and the soviet union? what role did the iran-contra affair play in both iran and nicaragua?

What was the earliest settlement shown on the map?

"if i have seen farther than others," said newton, "it is because i have stood on the shoulders of giants." who were the giants to whom newton was referring? could this be said of any scientific accomplishment? explain.