Answer
Both atoms in a carbon-carbon double bond have the same electronegativity, which means that the bond is nonpolar. As oxygen is more electronegative than carbon, a carbon-oxygen bond would be very polar.
Work Step by Step
Both atoms in a carbon-carbon double bond have the same electronegativity, which means that the bond is nonpolar. As oxygen is more electronegative than carbon, a carbon-oxygen bond would be very polar.