Losing weight or changing their appearance.
B is your answer, it can indicate when you are working above, below, or in your target zone.
Are there multiple choice questions?
Like all types of dementia, Alzheimer's is caused by brain cell death. It is a neurodegenerative disease, which means there is progressive brain cell death that happens over a course of time. The total brain size shrinks with Alzheimer's - the tissue has progressively fewer nerve cells and connections.