[ABC]

It should not really be a shock as roundabout/traffic circle rules are the same worlwide and Traffic in the Center lane always has right of way, however this should never cause a problem as if you are in the right hand lane you should be exiting anyway.

Roundabouts and Traffic Circle designs do differ across the US and the World but nowhere does the right hand lane have right of way as if this was the case traffic in the center lane would be unable to exit!