Answer: Trade between the two countries is beneficial when United States trade food to Canada and Canada would trade televisions to the United States.
Explanation: In international trade, each country will produce a good in which it has a comparative advantage (lower opportunity cost).
Opportunity cost of food is,
Unites states = 
Canada =
Opportunity cost of television is,
Unites states = 
Canada =
Since, opportunity cost of food is lower in the United states, United states will export food.
Opportunity cost of television is lower in Canada, Canada will export television to the United States.
A) Divisibility can easily be divided into smaller value.
Based on the CPI in both places, the Brexington salary in Charlieville is $30,000.
<h3>Brexington salary in Charlieville </h3>
This can be found by the formula:
= Brexington salary x CPI of Charlieville / CPI of Brexington
Solving gives
= 50,000 x (90 / 150)
= $30,000
In conclusion, option A is correct.
Find out more on CPI at brainly.com/question/512131.