The correct answer is <span>The need for natural resources and new markets
Imperialism is the idea that the United States actually should expand beyond its borders, which it did when it went westwards or when it took the Philippines. Being isolated is also against the idea of imperialism, while immigration is not as related to the idea. The only thing here is the need for resources and new markets which is a part of imperialism.</span>
The open door policy is where every country has equal trade in china
Brown v. Board of Education is important because it marked an important victory in the struggle for racial equality.
