The sentences that use commas correctly is A) Volcanoes spew molten rock and, mostly exist along the Pacific Rim.
George looks out for lennie, and there like brothers
That America was more powerful than other nations in terms of military might and various other factors . They could offer “help” in exchange for information, land for military bases, resources and security.
Answer: It improved greatly
Explanation: The Industrial Revolution was a time of incredible innovation some of which we're still paying the price for today. However, specifically to the question the Industrial Revolution improved production a ton because of new machinery that made production much faster than one person working on it at a time.