B)
Source: http://www.loc.gov/teachers/classroommaterials/presentationsandactivities/presentations/timeline/civilwar/recontwo/
Answer:
Bessemer had been trying to reduce the cost of steel-making for military ordnance, and developed his system for blowing air through molten pig iron to remove the impurities. ... This made steel easier, quicker and cheaper to manufacture, and revolutionized structural engineering.
Explanation:
Answer:
D. Government interference that lowered crop values
Stimulated by severe economic troubles, which produced radical political movements such as shays rebellion and urged on by a demand for a string central government
