is a time of establishing personal and economic independence, career development, and, for many, selecting a mate, learning to live with someone in an intimate way, starting a family, and rearing children.
A. Early adulthood
B. Late adolscence
C. Middle adulthood
D. Late adulthood

A.early adulthood is the correct answer

Explanation:

Early adulthood is the stage that is characterized by personal independence, reproductive ability, the grown-up become self-sufficient, independent and they explore various life opportunities.

The goal of this time period is to establish careers, homes, families, expand the social network, fulfill the sexual needs.

There are different challenges of early adulthood such as parenting, stress, intimacy, different lifestyles, divorce, trauma, depression, and effect of relation on the health

there are so many examples for that in different areas, like biology experiment carried out in our lab recently.

here's one link :

answer; closing the loop;