Answer:
C. More research should be done into the reproductive behaviours of the different species.
Step-by-step explanation:
The renewable resources are those which can be replenished after a single use. The crabs being a source of food can be replenish after successful copulation which could produce large number of progenies. Therefore, reproductive behaviours should be studied so as to provide them a suitable reproductive environment. So that more amount of fishing product can be obtained in future.