Final answer:
You are generally allowed to proceed past a tram that has closed its doors at up to the road's speed limit. However, always observe local traffic laws and regulations for any specific restrictions when passing a tram stop.
Step-by-step explanation:
When a tram has stopped at a tram stop, and all pedestrians have disembarked and reached the kerb, and the tram has closed its doors, you are generally allowed to proceed past the tram up to that road's speed limit. However, this can vary depending on specific local traffic laws or regulations, so it's important to follow any signage or rules that dictate a different speed limit in the vicinity of a tram stop. For example, some areas may have a lower speed limit specifically when passing a tram, even if the doors are closed and it appears to be safe to proceed.
In most cases, since no exceptional limit is indicated by the context, Answer C (Up to that road's speed limit) would be correct. However, it's essential to remain vigilant for the safety of any pedestrians who may still be in the vicinity and to comply with any local traffic regulations.