Which most devastating disease wiped out more than one third of the population all the way from china to western europe?
a. cholera
b. influenza
c. the black plague
d. typhoid

Without specializing, the total output for both countries after two days would be 48. if country a were to specialize in petroleum, its output would be after two days. if country b were to specialize in seafood, its output would be after two days.