Answer:
The Bessemer Process was the first inexpensive industrial process for the mass-production of steel from molten pig iron prior to the open hearth furnace. The key principle is the removal of impurities from the iron by oxidation by blowing air through the molten iron.
Explanation:
The type of Geographic location the humans tend to develop civilizations is the River valleys. They have better access to water and food, therefore that is why humans live near River Valleys.
The United States broke diplomatic relations with Germany, because Germany declared unrestricted submarine warfare against all ships.
The correct answer is C.
Keeping Communism from spreading beyond the countries already under it's influence
