Which events in and after the 1960s contributed significantly to the decentralization of England from London to a more regional focus, ultimately also making way for a less homogenous vision of England and the popularity of postcolonial fiction ?

• A. Radio announcers were permitted to speak in regional dialects and multicultural accents.
• B. The Arts Council designated many of its resources to supporting regional arts councils.
• C. Regional radio and television stations appeared throughout the country.
• D. all of the above