You are analysing coffee production per acre in three countries: Panama, Costa Rica, and Nicaragua. In your model you need to account for different labor laws in each country. Specifically, you believe that the laws in each country have a fixed effect on production per acre. You are considering three alternative specifications for the country variable(s) to include in your regression model: (I) Three indicator variables, one for each country. (ll) Two indicator variables, one for Panama and one for Costa Rica. (III) One variable equal to zero if the country is Nicaragua, one if the country is Costa Rica, and two if the country is Panama Which of the above specifications would produce the desired effect? Select one: Q a. only (I) b. only (H) O c. only (III) 0 d. either (I) or (II) 0 e. either (I), (II), or (III)