Answer:
The control of several countries. The response was to try to keep this control and work in expansion.
Explanation:
At the end of Century 19th the historians have considered the age of the American imperialism due to the United states did annex Hawaii and took the control over cuba, guam, Puerto Rico and Philippines.
These circumstances let the United States to grow and be prospered. The most productive economy was evidenced at the 1890 approximately.
