If you are driving a car with a foreign license plate in Spain, are you allowed to enter municipal environmentally restricted areas?

A)No, foreign-registered vehicles are completely banned from entering Spanish restricted zones under all circumstances.
B)Yes, you can check the official equivalence between your country's classification system and Spain's to determine your vehicle's access rights and drive using your home country's sticker.Correct
C)Yes, but you must first pay a standard tourist environmental tax at a Spanish border checkpoint.

The text confirms "Yes." Drivers of foreign-registered vehicles can check the equivalence of their home country's system to see the matching Spanish classification, allowing them to understand local restrictions and drive using their own country's badge.