The Bowl Championship Series is focusing on four main options for changing the system that determines college football's national champion, from minor tweaks of the current system to a full-fledged, four-team playoff at neutral sites, USA Today reported.

According to a two-page memo obtained by the newspaper, the proposals are not the only options being considered, but have been the focus of discussion on how to change the system, which has been a topic of debate since its inception. The BCS' leaders are meeting April 24-26 in Hollywood, Fla.

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