The value of the characteristic impedance R0 in terms of R1 and R2 and R0 in the circuit shown below is?

• A. R1+R2(R1+R0)/(R1+R0+R2)
• B. R1+ R2(R1+R0)/(R1+R0+R2)
• C. R2+ R2(R1+R0)/(R1+R0+R2)
• D. R0+R2(R1+R2)/(R1+R0+R2)