Is it determined by the following road sign which rules for giving right-of-way should be applied?

1. A Yes, when the following road sign is placed in an intersection, right-of-way is given to vehicles that continue driving straight only.
2. B Yes, when the following road sign is placed in an intersection, right-of-way is given to public vehicles only.
3. C No, right-of-way rules are determined according to the traffic load.
4. D No, right-of-way is determined according to lawful right-of-way rules or according to the traffic signs that are placed in the junction.