How did the industrial revolution affect business a. social harmony among classes was promoted b. production and shipping costs were high c. business people began to invest money d. new technology made production efficient

D. New technology made production efficient.

Explanation:

The Industrial Revolution introduced inventions that highly increased production efficiency. For example, the steam engine significantly lessened the time needed to create some goods. A higher efficiency in production allowed to reduce labor costs and, therefore, decrease prices, giving a whole new level of customers access to certain products.

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explanation:

abraham lincoln  (february 12, 1809  – april 15, 1865) was an american statesman, politician, and lawyer who served as the 16th  president of the united states  from 1861 until  his assassination  in april 1865. lincoln led the nation through the  american civil war, its bloodiest war and its greatest moral, constitutional, and political crisis.[2][3]  he preserved the  union,  abolished slavery, strengthened the  federal government, and modernized  the u.s. economy.