Answer:
Countries should establish overseas colonies to support their navies
Explanation:
Mahan’s argument in this quotation support the idea of imperialism by stating that countries should establish overseas colonies to support their navies.
The following shows the argument of Mahan:
1. He argued that increasing production would make overseas expansion inevitable
2. He argued that no nation should be allowed to own an island within three thousand miles of San Francisco
3. He also argued that a powerful navy should be put in place.
