According to a recent survey, married people average about _____ "unpleasant disagreements" with their spouse each month

The average time between the diagnosed onset of Alzheimer's disease and death is

a. six months. b. one year. c. six years. d. twelve years.

One Swedish study of genetic factors in the cause of dementia found that the concordance rate for monozygotic twins was _____ percent

a. 1 b. 20 c. 40 d. over 50