What type of evidence could be used to convince policy makers to pass a law to reduce overfishing, and how does this show cooperation between scientists?

a.) scientists could collect and combine data on fish populations all around the world to show that their populations are declining.
b.) scientists collect and combine data on fish populations all around the world to show that their populations are increasing.
c.) scientists work together and use past data to show that fish populations are becoming locally extinct in some areas.
d.)scientists work together and use past data to show that some fish populations are adapting to environmental changes.