Some apartments of the early 1900s were known as "dumbbell tenements" because they had?

I would say (A) because these houses was for the poor.

“the battle of stalingrad is not a turning point necessarily in strategic terms, because a lot more has to be done before the soviets can be certain of defeating germany,” says renowned world war ii historian richard overy. the germans had fought nearly a thousand miles across the soviet union to get to stalingrad.