Car C drives first, because it is turning right and there are no give way signs indicating that it must give way to any of the other cars.

Scooter A is turning left and must therefore wait for car C to turn. It is best if scooter A drives out into the crossroad to wait, so that any cars behind going straight may pass.

Car B has an obligation to give way to all the other cars, and he must probably give way to the scooter which is waiting at the crossroad.

Car D also has an obligation to give way to all the other cars, and must wait to cross.