Answer option D and E is wrong, please explain your answer.

In a country called Uncle Sam Land (USL), the labor demand curve is given by: W = K - 4L Where W is the wage rate, K is a variable determined by accumulated capital stock in the country, and L is the labor force in the country. Currently, K = 500 is supplied by the capitalists. The country has built a strong impenetrable border wall to prevent outsiders from moving in. The labor force is thus currently fixed at 100 (L =100). All workers work no matter what the wage is. What is the national income (all wages plus all income of the capitalists) in this country? Select one: O a. 10,200 b. 5,000 O c. 30,000 d. 65,000 x O e. None of the above