If Country A specializes in producing textiles at a lower opportunity cost than Country B, then Country B would be better off specializing in which of the following goods if it has a comparative advantage in that production? A:B :: C:?

If Country A can produce textiles more efficiently than Country B, it means Country A has a comparative advantage in textiles. This allows Country B to focus on producing goods where it is relatively better, or has a comparative advantage. For example, if Country B is better at producing electronics than textiles, it should specialize in electronics. By doing this, both countries can trade and benefit from each other's strengths. So, if A specializes in textiles, then B would be better off specializing in electronics.