Ionic species are stabilised by the dispersal of charge. Which of the carboxylate ion is the most stable

Ionic species are stabilized by the dispersal of charge. The carboxylate ion C is the most stable. The negative charge on O is dispersed through resonance in the carboxylate group. The negative charge is further dispersed due to negative inductive effect (-I effect) of F and Cl atoms present on $\mathrm{\alpha }$-carbon atoms. The decreasing order of -I effect is $\mathrm{F}-{\mathrm{CH}}_2-{\mathrm{COO}}^{⊝}$> $\mathrm{Cl}-{\mathrm{CH}}_2-{\mathrm{COO}}^{⊝}$. In fact, methyl group causes +I effect and destabilizes the carboxylate ion.