What are early symptoms of Alzheimer's disease?

The early symptoms of Alzheimer's disease often include personality changes and lack of interest, which aligns with option B. In the initial stages of Alzheimer's, individuals may exhibit noticeable changes in their behavior and character. This can manifest as mood swings, increased irritability, or withdrawal from social activities and previously enjoyed interests.

These changes can be compelling indicators of cognitive decline, as they often accompany difficulty in processing information and remembering recent events. Individuals may also struggle with organization and planning, leading to frustration that can alter their overall demeanor and interaction with others. Recognizing these symptoms early can be crucial for diagnosis and intervention, helping to manage the disease's progression more effectively.

In contrast, the other options do not reflect the common early signs of Alzheimer's. Increased energy and motivation, improved memory and cognition, and heightened social engagement would typically not align with the symptoms of Alzheimer's disease. Instead, these suggest positive behavioral changes that are contrary to what individuals usually experience when Alzheimer's begins to affect their cognitive functions.