This is a test of commonsense with single/multi-choices. Complete the next sentence:

How to recognize the signs of graves' disease
Pay attention to irritability.
Because this condition can throw your hormone levels out of balance, you may feel cranky or even more anxious than usual. You may also suffer from insomnia.

Pick from:
i. These if coupled with digestive symptoms such as fatigue, difficulty walking, and bowel pains. Also watch out for changes in appetite and sleeping patterns.;
ii. You might have difficulty sleeping, make decisions on a regular basis, and schedule unpleasant events. Do you frequently wake up suddenly? After going to sleep, do you forget your favorite foods? Are you confused about whether you sleep fresh or in the middle of the night? These behaviors are normal and a sign of graves' disease.;
iii. In many cases, you will not even remember these symptoms. Be aware of fatigue and sweating, especially if your homeowner's and/or renters's insurance covers them.;
iv. Of course, just feeling irritable doesn't mean you have graves' disease. However, if you are chronically feeling out-of-sorts and anxious and are having other symptoms, you should visit your doctor.;
The answer is:
iv.