Chris Willman Music WriterCountry stars Luke Combs and Maren Morris took on the elephant in the room in a joint interview for the annual Country Radio Seminar conference Wednesday, address perceptions of racism and a lack of diversity in the genre that have gone from behind-the-scenes Nashville discussions to the talk of the nation in the wake of the Morgan Wallen N-word scandal two weeks ago.Although Morris has been the most outspoken of the two on these issues prior to their Q&A, it may be