I believe it's <span>a. the ancient era
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Because they owned every step of the process to make steel like for example they owned the mines to mine the iron. Then they would own a 2nd mine to mine the coal for the steel. Then they would own the factories to make the steal. That is a vertical monopoly so for shorting your answer you can say they owned the mines and the factories to make the steel.
Answer:
The Grandfather Clause allowed many white Americans to avoid paying the poll tax and completing the literacy tests
Explanation:
It's called the grandfather clause because they used to use descendance and ancestry to decide if you were eligible to vote :)