During the Great Depression, young people indeed took on various responsibilities to help their families survive and cope with the hardships of that era. The best answer from the options provided would be:
B) Helping their families survive.
Many young people contributed by taking on jobs, helping with household tasks, and finding ways to support their families during this difficult time. While options A, C, and D also reflect actions some individuals might have taken, B most broadly covers the overall responsibility that young people had during the Depression.