Eliza wants to conduct a survey to find out how much time students from her school spend listening to music. Which of the following is an appropriate statistical question for this survey? Select one:
a. How many of you listen to music for an hour each day?
b. How many hours per week do you listen to music?
c. How many of you listen to music for more than an hour each day?
d. How many hours per week does the best musician listen to music?