a male fish and a female fish that could produce offspring the same fish just before it received a cut and after it healed a fish that lived recently and a fish that lived a long time ago the same fish just after it hatched and when it was full-grown
I gave my students this multiple choice question: Comparing the skeletons of which of the following fish would best show the evolution of a fish species?

Only one answer is correct among these 4 choices:
- a male fish and a female fish that could produce offspring
- the same fish just before it received a cut and after it healed
- a fish that lived recently and a fish that lived a long time ago
- the same fish just after it hatched and when it was full-grown

Could you tell me which one is correct?

a fish that lived recently and a fish that lived a long time ago