A Researcher Is Interested in the Effect of Maternal Warmth

A researcher is interested in the effect of maternal warmth on academic achievement. He devised a scale that measures warmth and uses student GPA has a measure of academic achievement. He finds that the correlation between the two variables is .60 and has a regression coefficient of .15. Which of the following statements is most accurate?

A) The researcher can conclude that a one unit increase in maternal warmth will cause a .15 decrease in GPA.
B) Maternal warmth explains 36% of the sample's variation in GPA
C) Students' GPA are lower for mothers who exhibit more warmth
D) The researcher can conclude that a one unit increase in maternal warmth is associated with a .60 increase in GPA.