Suppose We Wish to Understand the Relationship Between Two Variables

Suppose we wish to understand the relationship between two variables: social class and film genre preference. Which of the following would be a reason to prefer lambda as a measure of association?

A) Lambda allows us to understand whether our sample was drawn randomly from a well-defined population.
B) Lambda gives us clear criteria for knowing whether the association is weak, moderate, or strong.
C) Lambda is a symmetrical measure of association, so we will get the same value even if we were to reverse the X and Y variables in our calculation.
D) Lambda allows us to quantify exactly how much knowing a person's social class helps to predict their film preference.