单选题

GRAND CITY CENSUS REPORTS

(1950-1980)

Which of the following, if true, most helps to reconcile the increase in housing units with the decline in population shown in the table above?

A、 The percentage of families that included adult children living at home increased during the 1970's
B、 The number of people moving to Grand City from other cities gradually decreased during the three decades.
C、 The number of housing units that were vacant in Grand City fell steadily between
D、 The number of adults who lived alone in Grand City housing units increased dramatically between 1950 and 1980.
E、 Many housing units that were occupied by only one family in 1950 were occupied by two or more families in 1980.

【正确答案】 E

【答案解析】