Answer the following question given this paragraph: 

Another example is carbon dioxide. This gas is produced from a variety of reactions, often by the burning of materials. The structure of the gas consists of one atom of carbon and two atoms of oxygen. Carbon dioxide production is of interest in many areas, from the amount we breather out to the amount of the gas produced by burning wood or fossil fuels. By knowing the exact composition of carbon dioxide, we can make predictions as to the effects of different chemical processes.


Q: The structure of the gas carbon dioxide consists of one atom of carbon and two atoms of what?

 Choices:

- sulfur

- methane

- Helium

- oxygen

A:
oxygen
