Directions: The given question has three blanks, each blank indicating that something has been omitted. Choose the combination of words that would fit in the blanks correctly.

Alzheimer's ________ now largely agree that Alzheimer's ________ takes the form of a very long-lasting cascade in which various ________ processes of brain cells follow one another.

A. deterioration

B. researchers

C. inventors

D. disease

E. result