When given an estimated simple linear regression model, which of the following is true about R-square?

	A.	R-square measures the percentage of variation in the dependent variable that is explained by the variation in the independent variable.
	B.	A value of R-square that is close to 0 means the estimated regression model is significant.
	C.	R-square range is between -1 and +1
	D.	R-square measure the percentage of variation in the independent variable that is explained by the dependent variable.