A real estate builder wishes to determine how house size (House) is inuenced by family income (Income), family size (Size), and education of the head of household (School). House size is measured in hundreds of square feet, income is measured in thousands of dollars, and education is in years. The builder randomly selected 50 families and constructed the multiple regression model. The business literature involving human capital shows that education inuences an individual's annual income. Combined, these may inuence family size. With this in mind, what should the real estate builder be particularly concerned with when analyzing the multiple regression model? C) Randomness of error terms Missing observations 0 Collinearity O Normality of residuals