It describes the period after the fall of rome, the middle ages
The answer is C. Natural Gas
An example would be the Tariff Act of 1930.
Answer:
They did not have enough jobs as most of the travelers were rich men who did not work. They did not have enough labor to farm or make food. The water in the river near Jamestown was brackish water and was mixed with salt water. And there are also many other reasons. The answer is the first one.