$C{H_3}C{H_2}COOH\xrightarrow{{SOC{l_2}}}\,B\,$$ \xrightarrow{{N{H_3}}}\,C\,\xrightarrow[{B{r_2}}]{{KOH}}\,D$

The structure of $D$ would be

Choose the correct statement($s$).

$(A)$ The order of basicity is $II > I > III > IV$ .

$(B)$ The magnitude of $p K_{ b }$ difference between $I$ and $II$ is more than that between $III$ and $IV$.

$(C)$ Resonance effect is more in $III$ than in $IV$.

$(D)$ Steric effect makes compound $IV$ more basic than $III$.