Final answer:
Approximately 52 percent of American emerging adults between the ages of 18 and 29 were living with their parents as of 2016.
Step-by-step explanation:
According to recent studies, approximately 52 percent of 18-to-29-year-olds in the United States were living with their parents as of 2016. This is the highest percentage since 1900. The data from other wealthy countries shows that the percentage of 15-to-29-year-olds living with their parents ranges from about 80 percent in Italy to 30 percent in Canada. Therefore, the percentage of American emerging adults who 'return to the nest' to live at least once after they leave is likely to be higher than the given options of 10%, 25%, 40%, or 60%.