Which question is best addressed with the correlational strategy?

a. What is the average number of text messages that a typical adolescent sends in a month?

b. Is there a relationship between the number of text messages that adolescents send each month and the number of pages of leisure reading done by adolescents?
c. Does decreasing the number of text messages sent by adolescents cause an increase in number of pages read for leisure?
d. Will restricting access to portable devices increase the number of pages read for leisure?

b