42. Assume labor's share in production is 2/3 and capital's share is 1/3. If GDP grew at a rate of 6%, the labor force grew at 3%, and the capital stock grew at 3%, how much of the growth in GDP/worker was due to factor accumulation and how much to productivity growth?

a. It was about 50/50

b. It was all factor accumulation

c. It was all productivity growth

d. None of the above