Use reasoning to lead to the answer of the following question:
A traveler laments the fact that mass transit is limited in his city when his groceries get soaked by the rain as he waits where?\nOptions:\n- bus stop\n- library\n- motel\n- airport\n- subway
 Reasoning process:
User
A traveller waits at bus stop. When a traveller was waiting at bus stop his groceries get socked by the rain. Therefore, the final answer is bus stop.
Assistant