The similarity between all of them is that they all happened sometime in the 1920s.
Becouse they want to get caught or mislead the police
I'm not sure, but one may be using a sickle to cut plants/grass.
There are several technological advancements that led to New York City being able to produce taller buildings in order to service the growing population, since you provide no options, you can put :
- Fireproofed iron framed structure and foundation
- Elevator
- Electric Lighting
- Lightning Rod/Conductor
Hope this helps
