The grade point average (GPA) of students participating in an experiment on academic achievement rose over the course of the academic year. The students worked harder to do better in school because they knew that they were being studied. This is an example of:.

Read this example of social change in the american society and identify the agent that caused this change. in less than five years almost twenty-five percent of americans had access to the internet a . education b. population c . war and revolution d. science and technology