How Do We Deal with the Double Bonds During the Degradation

How do we deal with the double bonds during the degradation of unsaturated fatty acids?

A) Convert the three-carbon propionyl-CoA to succinyl-CoA and feed it into the TCA cycle.
B) Converge them with the TCA cycle to produce acetyl-CoAs.
C) Isomerize the position of the double bonds to converge them with the $\beta$ -oxidation pathway.
D) Reduce them to single bonds and feed the saturated fatty acid into the $\beta$ -oxidation pathway.