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.