Answer :
The correct option is b. Rosa because her opportunity cost of producing corn (0.67 kilos of wheat) is lower than Bianca (1 kilo of wheat). Rosa has the comparative advantage in producing corn because the opportunity cost is 0.67 kilos of wheat per kilo of corn, which is lower than Bianca's 1 kilo of wheat per kilo of corn.
Based on the information provided, Rosa has the comparative advantage in producing corn because her opportunity cost of producing corn is lower than Bianca's. Bianca can produce 1 kilo of wheat for every kilo of corn she chooses not to produce, making her opportunity cost of producing corn 1 kilo of wheat. On the other hand, Rosa can produce 2 kilos of wheat for every 3 kilos of corn she produces.
Thus, for every extra kilo of corn Rosa chooses to produce, she gives up 0.67 kilos of wheat (2/3). Therefore, the correct answer is:b. Rosa because her opportunity cost of producing corn (0.67 kilos of wheat) is lower than Bianca's (1 kilo of wheat). The correct option is b. Rosa because her opportunity cost of producing corn (0.67 kilos of wheat) is lower than Bianca (1 kilo of wheat).