Which three of the following conditions on earth at the end of the ice age made human survival easier? 1. Abundance of large animals 2. decrease in sea levels 3. extinction of mammoths 4. increase in vegetation 5. warmer global climate.

porter is writing economic history because he is focusing on the cost of developing vaccines.

native americans suffered high rates of poverty and unemployment.

during the late 1960s and early 1970sthe need for political militancy grew among the native americans. throughout the 1960s, they had been the nation's poorest minority group, the most deprived group, according to practically every socioeconomic measure. in 1970, the indian unemployment rate was 10 times the national average, and 40 percent of the native american people were below the poverty line.

pennsylvania, new hampshire, massachusetts, connecticut and rhode island .

to reform the distraught soviet union, the democratization of the communist party was promoted through party secretary mikhail gorbachev's policies of “perestroika” and “glasnost.” perestroika refers to the reconstruction of the political and economic system established by the communist party.