Which of the following is true of the early-onset type of Alzheimer's disease?
a) There is no significant difference in the progression of Alzheimer's disease in the early-onset type as compared to the late-onset type.
b) The progression of Alzheimer's disease in the late-onset type tends to be rapid.
c) The progression of Alzheimer's disease in the early-onset type tends to be quicker than in the late-onset type.
d) The progression of Alzheimer's disease in the early-onset type tends to be slow and steady.
