Answer:
B. Few people were able to save enough money for retirement.
During the early 20th century, many elderly people were supported by their adult children because few people were able to save enough money for retirement. At this time, retirement savings were not as common as they are today, and many people did not have the financial means to support themselves in their later years. As a result, many elderly people relied on their adult children for support, either by living with them or by receiving financial assistance from them. This was not necessarily seen as an honor or a responsibility, but rather a practical necessity given the lack of retirement savings and other financial support options available at the time.