A Pale 6-Year-Old Girl from a Poor Rural Area of Appalachia

A pale 6-year-old girl from a poor rural area of Appalachia presents with chronic complaints of "tiredness, upset tummy and the runs." She is found to have microcytic hypochromic anemia. Bile-stained eggs with polar plugs are found in her feces. This infection can be prevented by

A) Not swimming in contaminated water
B) Not using human excrement as vegetable fertilizer
C) Heating all canned foods to 60°C for 10 minutes
D) Avoiding cat litter or taking proper care when changing litter
E) Wearing shoes outside in endemic regions