The correct answer is C.
The central idea of this passage is that the US needs to grant its black population freedom and equality.
Douglass makes the argument that this country cannot reach its maximum potential if a good portion of the population is oppressed. He compares the oppression of African-Americans in the United States to cutting off the right arm of every soldier going to war -- senseless and dangerous.
What she means is that she had made 19 trips to Maryland, helped 300 people to freedom, yet she was never captured and didn’t fail to deliver her "passengers" to safety. As Tubman herself said, "On my Underground Railroad I [never] run my train off [the] track [and] I never [lost] a passenger." During these journeys she helped rescue people that were from her own family and people who weren’t from her own family. You can check her story in the America Library.
Answer:
The Bone Wars is an episode in the history of paleontology that led to the discovery of some of the most famous dinosaurs.
Explanation:
The rivalry between Cope and Marsh was what led them to commit illicit acts and even destroy several dinosaur bones in order to "destroy" each other.
They began to collect fossil bones, and hidden from Cope, Marsh had paid for the bones to easily reach him.
Although both were great scientists, instead of working together they attacked each other in a public way.
However, this enmity helped to discover large species such as Diplodocus or Anisonchus Copehater.
Finally, the one who "won the war" was Marsh, who found 80 new species of dinosaur, while Cope found 56.
D. We need to appreciate every moment of our lives.