What happens in certain Spanish cities during periods of high pollution regarding vehicles that do not qualify for an environmental badge?

A)They are allowed to circulate normally but must pay double the parking rate in green and blue zones.
B)They are completely prohibited from circulating or entering designated restricted areas.Correct
C)They are only allowed to drive during nighttime hours (from 10:00 PM to 6:00 AM).

Many cities already use this system to restrict traffic on high-pollution days, banning older, more polluting vehicles that do not carry an environmental sticker from entering or circulating.