Answer:
public sentiment supporting imperialism.
Step-by-step explanation:
In his book "The Influence of Sea Power Upon History", Alfred Thayer Mahan advocated for the need of a strong dominant power that would control the markets, governments and territories of the world.
He supported control of seas with strong naval infrastructures and imperialistic measures in establishing dominance over other countries. The statement mentioned above had the greatest impact on public sentiment supporting imperialism and dominance.
With the growing increase in the country's production and resources, Alfred felt that it was time for the country to focus on controlling seas and territories.