Respuesta :
The three are, 1). the need to expand even after the frontier had vanished, 2). the growing importance of foreign trade to the American economy and 3). the desire to compete with European empires for power.
1.exploitation if foreign regions for natural of white superiority
2. Promotion of white superiority
3. The spread of English language in South asia
2. Promotion of white superiority
3. The spread of English language in South asia
