Pediatrician: "Recent Research Has Shown That Babies or Young Children

Pediatrician: "Recent research has shown that babies or young children to nature can reduce the risk of developing allergies to pollen or grass. Therefore, instead of protecting children from the natural world, we should encourage them to play outside and allow them to get dirty. However, one should take this advice with caution. While it may be true that exposure to nature while young prevents allergies, it could increase exposure to other diseases and we don't yet know about other effects from such a practice."
Which of the following most accurately expresses the main conclusion of the pediatrician's argument?

A) We should expose young children to the natural world in order to prevent allergies.
B) We should allow children to play outside more often.
C) We don't yet know the full effects of exposing young children to the outdoors so we should follow the advice of a recent study with caution.
D) There is next to nothing we can do to prevent allergies from forming in children.
E) We try far too hard to protect young children from the natural world instead of allowing them to discover it for themselves.