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There is strong evidence that the cause of migraines (severe recurrent headaches) is not psychological but instead is purely physiological. ███ ███████ ███████ ████ █████ ████ ██████ █████ ██████████████ ███████ ███ █████████ ████ ██████ ██ █ ████████ █████████████ █████ ██ ███████ ████ ██ ██████ ███ █████ ██████████████ ███████ ███ ██████████
"Surprising" Phenomenon
If people undergoing migraine treatment tend to show more signs of anxiety (a psychological issue), how can it be that the cause of migraines has nothing to do with psychological factors?
Objective
The right answer will be a hypothesis that offers a difference between people who are being treated for migraines and people who are not. This difference will provide another explanation for why people who are receiving treatment tend to have more anxiety without saying that anxiety or other psychological factors cause migraines.
20.
Which one of the following, ██ █████ ████ █████ ██ ███████ ███ ████████ ███████████ ██ ███ ███████████ ██████
a
People who have ████████ █████████ ████ ██ ████ █████████ ███ ████ ████ ████████ ██████████
b
People who have ████████ █████████ █████ ██████ █████ █████████ ████ █████ █████████ ███████
c
People who rate ██████ ██ ███ ████████ █████████████ █████ ██ ███████ ███ ████ ██████ ██ ████ ████████████ █████████ ████ ███ ██████ ███ ████ █████ ██ ███ ██████
d
Of the many ███████ ████ ██ ███ █████ ██ ████████ ██████████ ████ ██ █████ ████ ███████ ████ █████████████ ███████ ████ ██ ███████ █████ █████████ ████ ████ ██████ ███████████
e
Most people who ████ █████████ ███ ███ ████ ████████████ █████████ ██████ ██ █████████ █████ ████ ████ ██████ ██████████ ███████ █████ ███████ ████████ ███ █████ ██ ██ █████████████ ██ ██████████████