Suppose that a worker in Cornland can grow either 40 bushels of corn or 10 bushels of oats per year, and a worker in Oatland can grow either 20 bushels of corn or 5 bushels of oats per year. There are 20 workers in Cornland and 20 workers in Oatland. Which of the following statements is true?

A. Both countries could gain from trade with each other.
V. Neither country could gain from trade with each other because Cornland has an absolute advantage
in both goods.
C. Oatland could gain from trade between the two countries, but Cornland definitively would lose.
D. Neither country could gain from trade with each other because neither one has a comparative
advantage.

D. Neither country could gain from trade with each other because neither one has a comparative advantage

Explanation:

Opportunity cost refers to the units sacrificed from production of one good to produce an extra unit of another good.

In the given case, the number of workers are same.

The opportunity cost for producing corn instead of oats by Cornland would be : 10/40 units of oats =  0.4 units of oats

Similarly, the opportunity cost for producing corn by Oatland = 5/ 20 = 0.4 units of oats

Similarly, the opportunity cost for producing oats by Cornland = 4 units of corn

Opportunity cost for producing oats by Oatland = 4 units of corn.

As can be seen, none of the two i.e Cornland or Oatland enjoys a comparative advantage over other since for both, the opportunity cost is the same.

Hence, neither country would gain out of trade.

steering wheels are always situated on the left side of the car.

always drive on the right side of the road.

white lines separate lanes of traffic traveling the same direction.

hashed or broken lines means you may change lanes when it is safe.

solid white lines mean stay in your lane.

yellow lines separate traffic moving in opposing directions.

hashed or broken yellow lines mean you can carefully pass, paying attention to oncoming traffic.

never cross a solid yellow line (or double yellow line).

when turning left at an intersection, pass in front of any cars that are turning left from the opposing direction (do not try to pass behind them).

use the left lane to pass other cars traveling your direction.

do not pass in the right lane unless absolutely necessary.

if you are driving in the far left hand lane and someone would like to pass you, move over to the right lane when it is safe to do so and allow them to pass.

you must always yield to pedestrians.

come to a complete stop whenever you see pedestrians trying to cross the street.

never pass a school bus if it has flashing red lights. wait until the lights have stopped.

be aware of bicyclists. often they share the road with cars and are supposed to also follow general traffic laws.

be particularly careful about driving in cities with bike lanes -- always check before turning that a bike is not coming.

it is mandatory to pull over or stop at an intersection to allow an emergency vehicle to pass you if you see one traveling with lights flashing and/or a siren running.

do not overuse your car horn. horns are used almost exclusively for emergency situations or for when you feel unsafe.

explanation: