In this question, we have to find which ions are classified as spectator ions. The definition of spectator ions is the ones that will not participate directly in any change in the reaction.
In a reaction we usually have 2 main changes for the ions, they can change their oxidation number, in a reaction called redox reaction. They can also change their physical state, going from aqueous to solid.
The spectator ions will not have their oxidation number changed and they will not change their physical state.
The 2 ions that can be classified as spectator ions are Na+ and NO3-