a producer with a comparative advantage has the ability to produce a good or service at\na lower opportunity…

a producer with a comparative advantage has the ability to produce a good or service at\na lower opportunity cost than any competitor can.\na faster rate than any competitor can.\na greater volume than any competitor can.\na lower cost than any competitor can.
Answer
Brief Explanations:
The concept of comparative - advantage in economics is defined by lower opportunity cost compared to competitors. It's not about speed, volume, or absolute cost.
Answer:
A. a lower opportunity cost than any competitor can.