In the linear regression models we study in this course, y = a + B1X, + B2In(X2) + e, which of the following statements is the most accurate? O a. In(y) is a linear function of x, and In(x2). Ob. y is a linear function of x, and x2. O c. In(y) is a linear function of In(x, ) and In(x2). O d. In(y) is a linear function of In(x, ) and x2. Oe. y is a linear function of x, and In(x2)