Which of the following statements describes the process by which oklahoma’s mountain ranges are changing? a. erosion is causing them to increase slightly in elevation each year. b. erosion is slowly wearing them down, making them shorter each year. c. tectonic plate movement is causing them to increase slightly in elevation each year. d. tectonic plate movement is slowly wearing them down, making them shorter each year.

2. what was the dred scott decision about? what do we learn from this supreme court case?

What explains the increase in life expectancy in botswana? a. the increased availability of jobs and an improved economy b. access to antiretroviral drugs, hiv/aids education, and widespread hiv/aids testing c. a series of military takeovers that stabilized the political system and led to education reform and increased literacy rates d. a recent military coup that led to an improved healthcare system select the best answer from the choices provided.

Which artificial waterway allows the passageway allows the passage of boats between buffalo and albany ( new york) and, eventually, the atlantic ocean? a. erie canal b. suez canal c. panama canal d. ontario canal