A Regression Analysis of Students' College Grade Point Averages (GPAs) $R ^ { 2 } = 0.311$

Multiple Choice

A regression analysis of students' college grade point averages (GPAs) and their high school GPAs
Found $R ^ { 2 } = 0.311$
11) Which of these is true?
I. High school GPA accounts for 31.1% of college GPA.
II. 31.1% of college GPAs can be correctly predicted with this model.
III. 31.1% of the variance in college GPA can be accounted for by the model

A) I only
B) none of these
C) II only
D) III only
E) I and II