The answer for 4.17 is C.
Work Step by Step
You have to look at the ions and determine the solubility. Na^+ is soluble with everything, so it will completely dissolve into the aqueous solution, along with NO3^-. However, Cl^- is not completely soluble with Ag^+, so AgCl will form a precipitate at the bottom of the solution. This is shown in figure C.