Final answer:
Yuna is in the 'Autonomy vs. Shame and Doubt' stage of Erikson's psychosocial development, where toddlers assert their independence and gain confidence by learning self-control, particularly around tasks such as toilet training. The answer is option B.
Step-by-step explanation:
Yuna, a toddler, is in the process of toilet training and after a week of staying dry overnight, she has developed a sense of self-control and feels confident. In the context of Erikson's psychosocial development stages, Yuna is in the "Autonomy vs. Shame and Doubt" stage. This stage is typical for children between the ages of 1-3 years and is characterized by toddlers learning to establish independence, often expressed by their desire to do activities on their own and making choices about their preferences, like food, toys, and clothing.
Erikson's stage of Autonomy vs. Shame and Doubt is critical because it sets the groundwork for a child's self-esteem and personal abilities. It is the stage where children like Yuna assert their independence and begin to exercise choice and self-restraint. If they are encouraged and allowed to function independently, but with guidance as needed, they develop a sense of autonomy. Conversely, if they are overly restrained or made to feel that their ability to navigate their environment is not to be trusted, they may develop feelings of shame and doubt about their abilities.