The oldest approach to preserving peace is through __________, with envoys sent from one state to another

Brazilian rubber tappers

a. lost their livelihoods when synthetic rubber was produced. b. have become environmentally active to protect the Amazon. c. plant two new trees for every one they kill by tapping it for rubber. d. have become the greatest force against indigenous rights in the Amazon. e. advocate clear cutting to enable new rubber trees to grow without competition.

In the nineteenth century, Native Americans were increasingly forced from their tribal lands because

  a. the federal government refused to make treaties with them, leaving them at the mercy of settlers.  b. the federal government repeatedly overrode state treaties that protected Native American rights.  c. state governments and settlers refused to abide by federal treaties or court rulings protecting Native lands, and the federal government did little to enforce its own laws.  d. native American ways clashed with the culture of white settlers, and so Natives increasingly moved west to remain apart.