In the education attainment and wage equation data set, we have data on log earnings (LGEARN) years of schooling (S) years of total work experience (EXP) years of work experience with the current employer (TENURE) years of work experience with the previous employer (PREVEXP) In particular, EXP=TENURE+PREVEXP. We want to test whether the effects of TENURE and PREVEXP on the log earnings are the same. Which of the following is correct? O We may run a regression of LGEARN on S, EXP, TENURE, and conduct a t test on the coefficient of EXP being one. We may run a regression of LGEARN on S, EXP, PREVEXP, and conduct a t test on the significance of the coefficient of PREVEXP. We may run a regression of LGEARN on S, EXP, TENURE, and conduct a t test on the significance of the coefficient of EXP. O We may run a regression of LGEARN on S, EXP, PREVEXP, and conduct a t test on the coefficient of PREVEXP being 1/2.