The correct answer is D. liver … gallbladder, NOT, and I repeat: NOT A. as the other person mentioned.
Bile is a fluid that is made and released by the liver and stored in the gallbladder, thus the answer is D.
Alzheimer's disease accounts for 60 to 80 percent of cases. Vascular dementia, which occurs after a stroke, is the second most common dementia type. But there are many other conditions that can cause symptoms of dementia, including some that are reversible, such as thyroid problems and vitamin deficiencies.
Any disease that is contagious like the Flu. Something like Alzheimer's would not be considered an infectious disease.