What was the hypothesis in the article titled, "Laboratory mice with a wild microbiota generate strong allergic immune responses"?
1) Genetically identical mice with exposure to many microbes from birth will differ in their allergic immune responses compared to mice that have no pathogens.
2) Immune allergic responses are harmful to mice and humans.
3) Allergic disorders are caused by a combination of hereditary and environmental factors.
4) Male mice have a greater immune response to allergens than do female mice.
