He studied the fossils' age and how tall the mountains are. He also studied how old they are. I don't know about Coal Beds but he also used balloons to find out the continents were once a big supercontinent called Pangaea and they apparantly drifted apart
D. Stephen Austin
Led by the Empressario, Stephen F. Austin, an initial grant for three hundred families--the "Old 300"--in 1821 opened up Texas to a flood of American immigrants, as many as 30,000 by the time of the Texas Revolution in 1835.
Though cultural features, language, clothing, and customs vary enormously from one tribe to another, there are certain elements which are encountered frequently and shared by many tribes.
Answer:
Según Sam W. Haynes, ¿cuáles fueron dos razones para la expansión de los Estados Unidos en
la década de 1840?
The answer is C. Capitalism.
