Final answer:
Erikson's Theory of Psychosocial Development suggests that older adults are in the stage of Integrity vs. Despair, where they reflect on their life achievements, which can result in feelings of satisfaction (integrity) or regret (despair).
Step-by-step explanation:
Erik Erikson's Theory of Psychosocial Development includes eight stages across the human lifespan, each with a unique challenge. For older adults, specifically in the period of late adulthood which begins from the mid-60s until the end of life, the stage is known as Integrity vs. Despair.
At this stage, individuals reflect on their lives, which leads to either a feeling of fulfillment and satisfaction, termed 'integrity', or a sense of failure, resulting in 'despair'. Therefore, the correct answer to the question "Erikson's Theory of Psychosocial Development suggests that older adults are in the stage of:" is A. Integrity vs. Despair.
This stage entails older individuals looking back on their accomplishments and either feeling content with a life well-lived or having regrets and facing the end of their lives with feelings of bitterness and depression. Comparable stages during other periods of life include Identity vs. Role Confusion during adolescence, where individuals work on establishing their self-identity and sense of self.