They're used by humans for fossil fuel and in entertainment. They were not created by the human race, they were created through thousands of being underground and soft tissues quickly decompose leaving the hard bones or shells behind. Over time sediment builds over the top and hardens into rock.
B.
The US never declared war on Germany because of the Poland invasion. Britain and France declared war on Germany because of the Poland invasion.
The United States was having the most problems with Japan, and the US declared war on Japan shortly after they bombed Pearl Harbor.
Once the US declared war on Japan, Germany declared war on the US due to the Tripartite Pact.
I think both were met with violent resistance in the South.
The answer would be B. The more slaves that survive, the more profit that the slave traders made. In this case, most slave traders were urgently wanting large amounts of profit. So, the traders would do as much as it took to keep as many as they could alive throughout the voyage.
When slaves die, the trader loses profit.