Answer:
I think B it seems like the best answer
I believe the answer is c b/c of the many different ways the cashier can divide (divisible) the $20 bill.
The causes of the final downfall of Kush are c. mysterious.
Explanation:
Kush was an ancient kingdom that was a great dominion in the region of Upper Ethiopia and it was trading across its borders into a lot of Africa when it fell into decline and became a ruin.
It is not entirely known what happened to it and the paragraph given here gives the picture of the civilization as it was in its end.
It was unsure of its place and was to be invaded but it still was found ruined without any war being waged so it had to be abandoned. But there is not reason why that happened that is known.
