When entering a roundabout that has no signs regulating right of way, you must...

A)merge before vehicles approaching from your left.
B)proceed normally because you have right of way.
C)yield to vehicles already circulating inside the roundabout.Correct
At intersections where there is no sign regulating right of way, we must yield to vehicles approaching from the right.
This rule applies at all times, except in the following cases:
- Vehicles travelling on a paved road have right of way over those coming from an unpaved road. (Image 1)
- Vehicles travelling on rails, such as trams, have priority over all other road users. (Image 2)
- Vehicles already circulating inside a roundabout have priority over those intending to enter it.
- Vehicles travelling on a motorway or dual carriageway have right of way over those intending to join it. (Image 3)