I don't really understand this and i was hoping someone could explain

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.

Imagine you are driving down the highway and reading a sign that states save the planet don't litter which technique of policy enactment is being used

The cause and events that led to civil rights