Final answer:
Middle age begins at 40 and ends at 65.
Step-by-step explanation:
Jocasta should say that middle age begins at 40 and ends at 65.
According to the information provided, middle adulthood typically starts in the mid-30s and continues until the mid-60s. During this stage, people show signs of aging, such as gray hair and wrinkles. They also experience physical declines and an increased risk of health problems, including heart disease, cancer, and diabetes.
Therefore, option b. Middle age begins at 40 and ends at 65 accurately describes the beginning and end of middle age based on the given information.