Carbon dioxide (CO2) is formed by the combination of one carbon atom and two oxygen atoms. The carbon atom (Group IVA) forms covalent bonds with the oxygen atoms (Group VIA). Specifically, carbon forms double covalent bonds with each oxygen atom, totaling two double bonds.
Given the response options you provided, the correct description would be:
four covalent bonds
However, note that the correct description in terms of bonds formed in CO2 includes two double bonds (which account for four total shared electrons), but none of the given options accurately state "two double bonds".