8. The figure shows a flowchart for computing $\frac { 1 } { 2 + \frac { 1 } { 2 + \frac { 1 } { 2 } } }$. The blank box should be filled with\\
A. $A = \frac { 1 } { 2 + A }$\\
B. $A = 2 + \frac { 1 } { A }$\\
C. $A = \frac { 1 } { 1 + 2 A }$\\
D. $A = 1 + \frac { 1 } { 2 A }$\\
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