Looking for trustworthy answers? Westonci.ca is the ultimate Q&A platform where experts share their knowledge on various topics. Get immediate and reliable solutions to your questions from a community of experienced experts on our Q&A platform. Experience the convenience of finding accurate answers to your questions from knowledgeable experts on our platform.

help asap
How did the closing of the American western frontier contribute to expansionist policies?
A. People felt that the frontier mentality helped drive and define American character
B. There were not enough raw materials for the entire country after hitting the West Coast
C. Western settlers began diverging and moving into Canada or South America
D. The US was running out of living space as more settlement sin the West were established