Which countries and/or continents had the highest numbers of people enter the U. S. from 1900-1960 and from 1970-1990?

India/russia

Explanation:

people start born 1900-1960 its cost 2billion people and russia was racing with india so they top 1 3.5 billion

- tobacco.

- "rolfe reacted to consumer demand by importing seed from the west indies and cultivating the plant in the jamestown colony. those tobacco seeds became the seeds of a huge economic empire.the tobacco economy rapidly began to shape the society and development of the colony. growing tobacco takes its toil on the soil."

< 3

the answer is 1.. i think