Help please with this chart for the post-classical African Societies. Will give Brainiest

Consider the demand for an inferior a good illustrated in the graph below suppose income decreases what effect would this have on the graph

Which of the following was probably the most difficult challenge facing construction of the railroad?

What were copernicus’s ideas about the order of the universe deemed to be dangerous to church thinking? (5 points) a. the church was invested in the idea that the earth was at the center of the universe b. copernicus was developing a new religion that would challenge the church c. the church feared his ideas threatened their control of european universities d. copernicus was a follower of luther and therefore could not be trusted