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Carbon dioxide (CO2) is formed when one carbon atom bonds with two oxygen atoms. In this molecule, each oxygen atom forms a double covalent bond with the carbon atom. Therefore, the correct response would be:
**Two double covalent bonds.**
However, since that option isn't among the provided responses, the most accurate option considering the total number of single bonds formed (if we consider double bonds existing as two) is:
**four covalent bonds.**
In summary, CO2 has 2 carbon-oxygen double bonds, which can be thought of as 4 individual covalent bond interactions.