Which of the Following Statements Is Correct

Which of the following statements is correct?

A) Slope is the ratio of the vertical change (the rise or fall) to the horizontal change (the run) .
B) A direct relationship is one in which two variables change in the same direction.
C) An inverse relationship is one in which two variables change in opposite directions.
D) An independent relationship is one in which two variables are unrelated.
E) All of the above.