Which of the following white precipitates dissolve in dilute acetic acid? (Select all that apply.)

Carbonate and phosphate are anions of weak acids and are protonated by acetic acid, so $\mathrm{BaCO}{}_3$ and $\mathrm{Mg}(\mathrm{NH}{}_4)\mathrm{PO}{}_4$ dissolve. $\mathrm{CaC}{}_2\mathrm{O}{}_4$ is insoluble in acetic acid (it needs a mineral acid), and $\mathrm{BaSO}{}_4$ is insoluble in dilute acids because sulphate is the anion of a strong acid.