A Researcher Studied the Relationship Between Family Income and Amount $\mathrm{R}^{2}$

A researcher studied the relationship between family income and amount of money spent on an automobile. She calculated that $\mathrm{R}^{2}$ = 45%. Which is the correct interpretation?

A) None of these
B) 45% of the price of the car can be predicted by using income.
C) The probability of predicting the correct price of a car is 45%.
D) 45% of the variability in car price can be explained by using income.
E) The car price fluctuates 45% more than income.