A study measures the effects of 3 levels of drug dosing on feelings of well being (as measured by a 4-point scale). Higher ratings indicate higher doses and better well being, respectively. Correlation analysis results in an r2=0.8. Which one of the following is the best interpretation of these results?

(A) increasing doses of drug are highly correlated with increases in feelings of well being
(B) increasing doses of drug cause increases in feelings of well being
(C) increasing doses of drug are highly correlated with decreases in feelings of well being
(D) increasing doses of drug cause decreases in feelings of well being