Which statement regarding the early civilizations of the Mayans, Aztecs, and Incas is true? A. Both the Mayans and the Aztecs inhabited parts of the North American continent
B. The Mayans, Aztecs, and Incas were inhabitants of what is now West Africa
C. The Mayans and Incas co-existed in Central America in what is now Mexico
D. Both the Incas and Aztecs inhabited the land areas along the western coast of North America

Pj conducts an experimental study on the effects of soft music during high stakes science testing. he randomly assigns students at the school. in one condition he does not provide music for testing while in the other group he does provide the music. he administers a pretest at the beginning of the year and a posttest at the end of the year. pj’s design is best described as a: a.static group comparisonb. pretest-posttest control group designc.control-group-time-series designd. nonrandomized control-group pretest-posttest design