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, ,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? ( = +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"