Read the scenario below and answer the question that follows. Robert, who was 30 years old, began to become frustrated and depressed because he had not accomplished all he wanted to yet in life. Based on the information in the scenario, what can be concluded about Robert's emotions? A. Robert’s issues reflect a temporary crisis that will subside in a year. B. Robert's emotions are uncommon and not related to aging. C. Robert's issues with aging will not change unless he receives therapy. D. Robert's emotions are a common reaction to aging stresses in adulthood.