In North America, the Relatively High Incidence of Expanded Family

In North America, the relatively high incidence of expanded family households in the lower class is

A) the reason why the families of lower-class urbanites are dysfunctional.
B) an important strategy the urban poor use to adapt to poverty.
C) maladaptive, since poor families should be smaller in order to cut down on expenses.
D) caused by bifurcate merging, a practice brought to the United States by Irish immigrants during the early part of the 20th century.
E) the result of enduring cultural ties to Europe.