Which of the Following Statements Explains Why Trading Partners Are

Which of the following statements explains why trading partners are often concerned about each other's labor standards?

A) From a humanitarian perspective, people do not want to buy products if workers are in oppressive conditions.
B) Unions realize that low labor standards will result in more costly products that cannot compete with those produced in countries with high labor standards.
C) Some nations do not want to establish their own labor standards, and prefer that standards be set by a foreign country.
D) Consumers are concerned that higher labor standards will lead to higher prices.