Reduction occurs at which electrode? A. The electrode that releases ions into solution
B. The electrode with the lowest reduction potential
C. The electrode that removes ions from solution
D. The electrode that loses electrons in a redox reaction

(Answer is C.) ​

The electrode that removes ions from solution

Explanation:

Each electrochemical cell consists of an anode and a cathode. Oxidation occurs at the anode and reduction occurs at the cathode.

At the anode, ions move from the electrode into the solution while at the cathode ions move from the solution to the electrode.

At the cathode, metal ions accept electron(s) and become deposited on the electrode hence this electrode removes ions from solution. This is reduction.