You are presented with the question "What  can cause illness?" and the following answer choices: 
- a nylon cord
 - burning coal
 - a plastic bag
 - heat or cold
 - a wool sweater
 - a leather purse
 - Pesticides
 - Sulfur dioxide

Now knowing that plastics are made from petroleum and produce toxic waste and toxic wastes can cause illness or death, choose the best answer.


 

   a plastic bag      