Which is not a characteristic of cities in the 1800s? a) a huge decline in poverty and crime b) pore housing and unsanitary conditions c) lack of modern sanitation services d) urban housing, factories, and shops of shoddy construction

I'd have to go with A

A) a huge decline in poverty and crime  

the viking voyages took place during the middle ages, which was about this time. 500 to 1350. the viking voyages took place during the middle ages, which was about this time.

the answer is going to be c