Answer: Alzheimer's disease
Explanation:common symptoms that one will experience are forgetfulness
Or memory loss that may result to a person asking the same thing over and over for example she keeps thinking someone keeps opening her stove; which means she is also becoming suspicious that is also one of the signs of dementia.
Problems with communicating correctly is also a sign where she is found rambling which is a sign of forgetting some words or using them correctly.
The age also is the contribution to being affected by dementia.