Answer:
Caprock
Explanation:
Texas is divided into four regions. North central plains are a region of Texas which is largest region. There is a bed of rocks known as Caprock below the soil. Caprock prevents the flow of any water or oil from below and these does not reach the soil. These rocks are harder and more resistant type of rocks.
It would be an "embargo" that occurs when one nation refuses all trade with another, although usually these embargo's only apply to a single group of goods, not all goods at the same time.
That would be the principal of federalism
A. Speaker A and B is correct
