A Concentration Cell Is Constructed by Using the Same Half-Reaction

A concentration cell is constructed by using the same half-reaction for both the cathode and anode. What is the value of standard cell potential, E , for a concentration cell that combines a silver anode in contact with 0.10 M silver nitrate and a silver cathode in contact with 0.00003 M silver nitrate? (E = + 0.80 V for Ag/Ag⁺)

A) -0.21 V
B) 0.00 V
C) 0.80V
D) -0.80 V
E) +0.21 V