What are the five developmental tasks of young adulthood, and how can the accomplishing of one influence the accomplishing of any of the remaining four?

Developmental tasks are the asks that individuals have to learn throughout their lives. It is important to successfully achieve certain tasks, because it is expected to lead to happiness and to success with later tasks.
The five developmental tasks of young adulthood are: Becoming more self-sufficient, preparing for a job or career, becoming socially responsible, learning to get along with friends of both sexes, accepting one's physical body and keeping it healthy.The accomplishing of one task influences the accomplishing of another one. For example if the individual learn to get along with friends she/he will become socially responsible. 

Ibelieve that the answer is d. because that is the only option that is efficient.

What's the rest of the problem? lol