Answer:
what is the answer choice
<span>Kings at the time usually didn't have heirs to the throne, because of this by killing the king you bring confusion to the country. No one knows what to do and everyone wants to be the new leader. So the king dying was a great chance for Alexander to take over Persia.</span>
... discourage African Americans from voting.
Poll taxes means you have to pay a tax before allowed to vote. That's a way of preventing poor persons (like blacks in the South) from voting.
In addition to poll taxes, other measures were also used to block blacks from participating in the voting process. For instance, literacy tests would require persons to pass certain standards of reading and writing in order to qualify for voting. These tests were aimed at blacks, who had not had access to the same education as whites.
they simply traded silk for horses from ferghana because the chinese believed these horses were better than the one they had.