The Following 0 Which One of the Following 0

Multiple Choice

The following 0.1 M aqueous solutions are arranged in order of increasing pH, with the highest pH on the far right. $$\begin{array} { | l | l | l | l | l | } \hline \mathrm { HClO } _ { 4 } & & \mathrm { KNO } _ { 3 } & \mathrm { KNO } _ { 2 } & \mathrm { RbOH } \\\hline\end{array}$$
Which one of the following 0.10 M aqueous solutions should be placed in the empty box?

A) CuSO₄
B) NaNO₂
C) CH₃NH₂
D) NaHCO₃
E) Na₂HPO₄