Suppose you assumed the following data-generating process for Y : Yi=+1Ti+2X1i+3X2i+4X3i+Ui Suppose further that the population regression equation for T is: Ti=A+B1X1i+B2X2i+B3Zi+Vi where A,B1,B2,B3 are all >0. If you regressed Y on T only, which of the variables X1,X2,X3, and Z are likely to be confounding factors in your attempt to measure the effect of T on Y ? Instructions: In order to receive full credit, you must make a selection for each option. For correct answer(s), click the box once to place a check mark. For incorrect answer(s). click the option twice to empty the box. x1 x2 x3