Which of the following sentences does not belong in this cause-and-effect paragraph?
Only recently have I been able to identify the causes of my
migraine headaches. First of all, when I eat dark chocolate,
I inevitably end up with a migraine. I love dark chocolate,
so this is sad news for me. Lack of sleep also seems to
trigger my migraines. One other cause that surprised me
was changing time zones, whenever I travel to a different
part of the country, I often experience a migraine. Now that
I know the causes of my migraines, maybe I can do
something to prevent them.