School zones and playground zones both lower the speed limit. What is the clearest difference between them? · Q-0088

School zones and playground zones both lower the speed limit. What is the clearest difference between them?

1. a A school zone is keyed to school days and stated hours; a playground zone applies every day from dawn to dusk
2. b Playground zones apply only when children are visible; school zones apply always
3. c They are the same restriction under two names
4. d School zones apply only in cities; playground zones only in rural areas

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