Refer to the Figure Shown

Refer to the figure shown.
If the figure on the left represents the initial state and the membrane shown in the beakers is permeable only to Na⁺, which manipulation would cause a net negative charge on the left side of the membrane once the system comes to equilibrium?

A) Making the membrane permeable only to water
B) Allowing the membrane to become permeable to K⁺ as well as to Na⁺
C) Tripling the amount of A₂^‒ and allowing the membrane to become permeable to A₂^‒
D) Tripling the amount of A₁^‒ and allowing the membrane to become permeable to A₁^‒