DrOswald Conducts a Study Examining the Relationship Between the Number

Dr.Oswald conducts a study examining the relationship between the number of friends one has and the experience of daily stress and life satisfaction.She randomly samples 1,500 elderly men and women in the Memphis,Tennessee,area in the southern United States.Below are her findings.
-Life satisfaction and experience of daily stress: r = -.57 ( p = .01)
-Number of friends one has and experience of daily stress: r = .09,not sig.
-Number of friends one has and life satisfaction: r = .36 ( p = .04)

-Dr.Oswald has decided to examine one of her relationships with a scatterplot to double-check for a curvilinear relationship.Which relationship will be most important for her to examine?

A) Life satisfaction and experience of daily stress
B) Number of friends one has and experience of daily stress
C) Number of friends one has and life satisfaction
D) Life satisfaction,experiences of daily stress,and number of friends one has simultaneously