Regarding research on fish, it can be inferred from the passage that A. research studies of the acquisition of important skills by fish have only recently begun to document the role of conspecifics in the learning process B. research on social learning in guppies suggests that guppies differ in important ways from most other fish in the means by which they learn particular skills C. research on social learning in fish has generally focused on the acquisition of skills other than foraging D. research has established that social learning occurs in some fish species without investigating the development context in which it occurs. E. research to investigate social learning has been done more extensively on fish than on other aquatic animals.