Fact 1: Carbon monoxide is a gas produced by furnaces and other devices that burn fuel.

Fact 2: Carbon monoxide can kill.

Given the two facts above, answer the question "Burning fuel in a furnace can " with the following options: 
- fire interns
 - kill
 - death
 - furnish a home
 - freeze water
 - harm
 - loss
 - expand


 

  kill       