The transcontinental railroad was a key role in the industrial revolution because it was the only way for supplies to get from one part of the country to the other. The train was also the fastest mode of transportation at the time so it was also important for travel. I hope this helped.
The Sugar Act reduced the rate of tax on molasses from six pence to three pence per gallon, while Grenville took measures that the duty be strictly enforced. The act also listed more foreign goods to be taxed including sugar, certain wines, coffee, pimiento, cambric and printed calico, and further, regulated the export of lumber and iron.
All of the answers you chose were correct great job .
The thing which was a major factor that threatened the major unity in the United States in the mid-19th century was:
<h3>The Great Depression</h3>
This refers to the period around 1929 in the United States which has a profound effect on the national economy.
This led to the failure of many banks, increase in unemployment and high deflation rates which all threatened the national unity.
Read more about Great Depression here:
brainly.com/question/441267
B, the enlightenment was all about explaining with reason, and religion didn't play a role in the enlightenment. Lots of scientists questioned the church.