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

How to know if you have chagas disease
Look for swelling at the bite site.
The swelling usually appears one week after the bite. The bite site becomes a boil-like, hard and violet colored lesion that may persist for several weeks.

Pick your answer from:
1). You should also be on the lookout for redness or swelling on your gums, on your eyelid, and in between your top and bottom lip. Otherwise you may feel woozy and dizzy.;
2). The swelling is due to multiplication of the parasite locally in the tissue that leads to inflammation. It is known as " chagoma ".;
3). The boil is also painful to look at and it will become infected within four to six weeks. In addition, an infected person may have the rash spread to other parts of the body, including facial tissues, ears, neck, hands, feet and mouths.;
4). Blisters may appear and then contract. Identify symptoms that point to chagas.;
The answer is:
2).