Comparisons regarding acid/base strength is (are) correct?

(A) Correct. The $p$-nitrophenoxide ion is stabilised by delocalisation of the negative charge onto the nitro group through resonance ($-R$, $-I$), so $\mathrm{p}K_a\approx7.2$ compared with about $10$ for phenol. (B) Correct. The lone pair of nitrogen in $p$-nitroaniline is pulled into the ring and the nitro group by the $-R$ effect, so it is less available for protonation; the conjugate acid has $\mathrm{p}K_a\approx1$ against $4.6$ for anilinium. (C) Incorrect. The methyl group is electron donating ($+I$, hyperconjugation) and destabilises the carboxylate, so $p$-toluic acid ($\mathrm{p}K_a\approx4.37$) is weaker than benzoic acid ($4.20$); benzoic acid is the stronger one. (D) Incorrect. The $-I$ effect of chlorine stabilises the carboxylate, so chloroacetic acid ($2.86$) is stronger than acetic acid ($4.76$). Answer: A and B.