A Chemist Places Ba(NO₃)₂ in One Flask and Na₂SO₄ in Another

A chemist places Ba(NO₃) ₂ in one flask and Na₂SO₄ in another. Water is added to both flasks and the mixture in the first flask is added to the second. Which choice below describes correctly the results of this experiment?

A) Both of the compounds in the flasks dissolve when water is added and NaNO₃ precipitates when the contents of the flasks are mixed.
B) Both of the compounds in the flasks dissolve when water is added and BaSO₄ precipitates when the contents of the flasks are mixed.
C) Both of the compounds in the flasks dissolve when water is added and there is no precipitate when the contents of the flasks are mixed.
D) The Ba(NO₃) ₂ does not dissolve in water, but the Na₂SO₄ does dissolve. There is no change upon mixing the contents of the flasks.
E) none of these