Answer:
The U.S. will need a powerful Navy and naval bases.
Step-by-step explanation:
The sentence that he would support is that The U.S. will need a powerful Navy and naval bases.
Alfred T mahan was a naval officer as well as historian. He was a great supporter of imperialism.
According to him sea power is very crucial to America as it would protect their shipping and Grant them access to world market. He stressed that sea power was important to America's greatness.