I disagree with your answer.
Check this site.
http://web.bsu.edu/dlb/t/science/method/interpret.htm
Jeff says, "It seems like the more money people make, the more debt they assume," but a/an __________ study might make the case that a rise in income does not by itself cause an increase in debt.
criterion validity
case
experimental
correlational
I chose C.
5 answers
based on the websit you provided I will assume it is B.
Please check the website again -- particularly the questions near the bottom Click on Answer for the type of research used.
D!! Thank you
Right. The study would correlate credit card debt with household income.