National border is the type of border among the following choices given in the question that would likely have the most protection. The correct option among all the options that are given in the question is the third option or the penultimate option. I hope the answer helps you.
Is there a passage I could read to answer it?
Compared to its rivals, Carnegie Steel is able to offer its goods for less money. Because he controlled the raw material supply, the means of manufacturing, and the channels of distribution, Carnegie was able to reduce expenses.
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What cost-cutting measures took Carnegie?</h3>
He promoted bonds and made investments in oil and railroad sleeper carriages, but iron production was his main line of work. He relentlessly adopted practices that reduced per-unit costs, introduced the railroad industry's cost-accounting methods, and hired skilled chemists.
Because he controlled the raw material supply, the means of manufacturing, and the channels of distribution. Because Carnegie produced a subpar item, production costs were lower.
Hence choice 2nd is correct.
Learn more about Carnegie Steel :
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