The astrolabe, an example of improved technology of the 15th and 16th centuries, had the greatest impact on a) literacy rates. b) building methods. c) navigation skills. d) artistic techniques.

this isn't a question and if you're going to list things be kind and use commas.

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.