The escalator was important because during the 1890’s the huge buildings with 20 floors was incredibly difficult for people to walk up on on a daily basis so it was important that they found a solution to that problem
Organic solidarity originates from the reliance that emerges from specialization of work and the complementarities between individuals—an advancement which happens in present day and mechanical social orders.
Organic solidarity is social solidarity dependent on a division of work that outcomes in individuals relying upon one another; it stands out from mechanical solidarity. In human science, natural solidarity clarifies what ties mechanically progressed, industrialized social orders together.
Americans decreased their family size in the 20th century because, the government offered an incentive if the family size stayed small. So the answer would be C.
