Final answer:
The middle-stage Alzheimer's disease, also known as moderate Alzheimer's, lasts the longest among the three stages of the disease and involves increasing care needs due to worsening symptoms.
Step-by-step explanation:
Is it generally true that middle-stage Alzheimer's disease lasts the longest of the three stages? The correct answer is a) Yes, middle-stage Alzheimer's disease is the most prolonged stage. Alzheimer's disease is a progressive condition categorized into three main stages: mild, moderate (middle-stage), and severe. The middle-stage, also known as moderate Alzheimer's disease, indeed tends to last the longest. During this stage, individuals typically need greater levels of care as they may experience pronounced symptoms such as significant confusion, memory loss, and difficulty with language and thought processes. As the disease advances, the severe stage also presents considerable challenges, though it may last for a shorter duration than the middle-stage.