Answer:
The answer is d. B had higher real GDP and real GDP per capita.
Step-by-step explanation:
Total real GDP of country A ( in one working day): Number of working persons x average working hour per day x productivity = 600 x 8 x 2.5 = 12,000;
Total real GDP of country B ( in one working day): Number of working persons x average working hour per day x productivity = 560 x 8 x 3 = 13,440;
GDP per capita of country A (in one working day): Total real GDP of A ( in one working day)/ total population of A = 12,000 / 1,000 = 12;
GDP per capita of country B (in one working day): Total real GDP of B ( in one working day)/ total population of B = 13,440 / 800 = 16.8.
Thus, country B had higher level of real GDP and real GDP per person in comparison to country A.