In Regression Analysis, an R Square (R²) of 1

In regression analysis, an R square (R²) of 1.0 would indicate:

A) that 1 percent of the data points are on the regression line.
B) that 1 percent of the total mixed costs can be attributable to fixed costs.
C) that 1 percent of the total mixed costs can be attributable to variable costs.
D) that there is a perfect correlation between the independent and dependent variables.