The National Opinion Research Center administered the General Social Survey (GSS) in 2010 to persons in the United States who were 18 years of age or older. One question asked married respondents for the highest grade of school that they had completed (Respondent Years of Education). Another question on the General Social Survey (GSS) asked married respondents for the highest grade of school that their spouse had completed (Spouse's Years of Education). A scatterplot of these two variables with the least squares regression line is presented below. The correlation between a respondent's years of education and their spouse's years of education is r = 0.70. Which of the following statements is true? O 30% of the variance in spouses' years of education can be explained by the respondents' years of education. O 49% of the variance in spouses' years of education can be explained by respondents' years of education. O 51% of the variance in spouses' years of education can be explained by respondents' years of education. O 70% of the variance in spouses' years of education can be explained by respondents' years of education