A researcher was interested in the effects of living arrangements (on campus, with family, independently) on weekly study time in first year university students. The researcher also hypothesized that this effect of living arrangements on study time would differ between full time and part time students. What would be the best way to view this data in a graph,so that the presentation of the variables clearly shows the relationships hypothesized?

a.X axis: study time, Y axis: living arrangements, Separate Lines: enrolment status.

b.X axis: enrolment status, Y axis: study time, Separate Lines: living arrangements.

c.X axis: living arrangements, Y axis: study time, Separate Lines: enrolment status.

d.X axis: living arrangements, Y axis: enrolment status, Separate Lines: study time.