I want to know the answer to the following question:
Which two wrote Cultural studies [were] grounded in a pragmatic, liberal-pluralist tradition?
All the background I'm provided with is that "The American version of cultural studies initially concerned itself more with understanding the subjective and appropriative side of audience reactions to, and uses of, mass culture; for example, American cultural-studies advocates wrote about the liberatory aspects of fandom.[citation needed]". Is that enough to answer the question?