EXTRA POINTS - environmental systems 1. Select the THREE hypotheses that explain why being born in the United States leads to a higher chance of developing allergies.

a) Other factors which might influence why there are more children with allergies in the United States include climate, obesity, and the typical western diet with high amounts of processed foods.

b) Cultural practices may play a part because some cultural foods have different anti allergenic properties.

c) Children in the United States are taught to believe in allergens, but really allergens don't really exist.

d) The weather patterns in the United States bring more allergens compared to other countries.

e) The hygiene hypothesis claims that children in the United States are not exposed to enough germs in their infancy and childhood to develop their immune systems properly.