An otherwise healthy eight-year-old child dies from congestive heart failure in a Honduran village. Her doctor suspects Chagas' disease. Which of these suggestions would NOT help to prevent other children in the village from the same fate?
a. Use xenodiagnosis to determine whether children are infected with the protozoan.
b. Replace thatch and mud-brick homes with concrete or brick.
c. Avoid swimming and wading in freshwater ponds.
d. Sleep under insecticide-impregnated nets.