Ella conducted a survey to find out the amount of time high schoolers spend surfing the Internet. From the data collected, the range of time spent was 1 hour. What does this range say about the data?

a All the students surveyed spend exactly 1 hour surfing the Internet.
b All the students surveyed spend an average of 1 hour surfing the Internet.
c The difference between the greatest amount of time and the least amount of time spent surfing the Internet is 1 hour.
d The quotient between the greatest amount of time and the least amount of time spent surfing the Internet is 1 hour.