IX. Read the passage carefully, then mark the letter A, B, C, or D on your answer sheet to indicate the correct answers from question 33 to 37:
Many people are unaware of how pesticides affect our food supplies. Health risks are the inevitable result. Pesticides can run off into nearby streams, where they are carried from their original dispersal site. This is how pesticides end up in drinking water, fish and game. And because of wind, rain, and evaporation, residues routinely show up in animals in the remostest parts of the world. For example, if grain fields on rough lands are sprayed with pesticides, residues can show up in poultry, eggs, milk, and butter. The end result is that every food we eat carries pesticides as the inevitable consequence of spraying crops with these poisons. And human exposure doesn’t even end there residues are transferred from mother to child through the placenta and mother’s milk.
The main idea of this paragraph is that ____.
