How did the geography of the Nile River valley lead to the growth of a civilization there?Please answer this, I really do need it for a quiz of mines up-coming.

For each of the following examples of data, determine which scale of measurement is used. a) the number of miles joggers run per week. b) the starting salaries of graduates of mba programs c) the months in which a firm's employees choose to take their vacations. d) the final letter grades received by students in a math course.