A Child Has Been Diagnosed with Ascariasis (Roundworm)

A child has been diagnosed with ascariasis (roundworm) .The statement made by her mother that may suggest a cause for her condition is:

A) "I've been airing out the house on these nice breezy days. "
B) "My child often goes out to the garden and pulls up a carrot to eat. "
C) "She runs barefoot so much I have to wash her feet at least twice a day. "
D) "We just remodeled our bathroom at home. "