What symptom is most commonly associated with early-stage Alzheimer's disease?

The symptom most commonly associated with early-stage Alzheimer's disease is difficulty recalling recent events. In the early stages of Alzheimer's, individuals often experience memory loss that primarily affects their ability to remember new information or events. This can manifest as struggles to remember recent conversations, appointments, or where they placed objects. Such memory issues are a hallmark of the disease and arise due to the progressive degeneration of brain cells, particularly in areas involved in memory function.

While diminished tactile sensation may occur due to various neurological conditions, it is not specifically linked to Alzheimer's disease. Severe motor impairment and visual hallucinations are typically associated with later stages of the disease or other neurological disorders. Consequently, the presence of difficulty recalling recent events is a key early warning sign of Alzheimer's, making it the correct answer in this context.