Use reasoning to lead to the answer of the following question:
Residents socialized, played dice, and people smoked all at the busy landing of the what?
Options:
- airport
- apartment building
- stairwell
- ocean
- casino
 Reasoning process:
Apartment building is a community having 10 to 20 homes or a block of apartments. Residents socialized, played dice, and people smoked all at the busy landing of the apartment building. Therefore, the final answer is apartment building.