I need help reviewing these answers for my homework can you please help me make sure i have the right answer?

I need help reviewing these answers for my homework can you please help me make sure i have the right answer?QUESTION 1

1. A country has a comparative advantage in producing some good X if it:
2. a.uses fewer resources to produce good X than its trading partners do.
3. b.produces good X at a lower opportunity cost than its trading partners.
4. c.has more experience producing good X than its trading partners do.
5. d.has more resources at its disposal than its trading partners do. 

1 points