Final answer:
The correct answer is option c. Lack of cognitive stimulation.
Step-by-step explanation:
After George retired from teaching and became less practiced in using his memory, his decline in memory is likely due to lack of cognitive stimulation. While it's true that age-related memory loss does occur, memory can often be maintained through engagement in mentally stimulating activities. Alzheimer's disease is characterized by severe forgetfulness and other cognitive impairments due to plaques in the brain, and it usually presents with more pronounced symptoms such as disruptive memory loss, confusion about time or place, and personality changes.
George's situation seems to be more accurately described by decreased cognitive exercises, which can affect memory. It is also noteworthy that cognitive rehabilitation can help offset mild cognitive impairments, suggesting that active engagement in cognitive activities can be beneficial in maintaining memory function.
As people age, the risk for diseases such as Alzheimer's disease increase, and symptoms like memory loss and changes in cognitive abilities become more common. However, these symptoms need to be severe and long-lasting to be indicative of Alzheimer's. Additionally, it's important for elderly individuals to stay connected socially and find meaning in life after retirement, which can contribute to a healthier cogniive function.