(9) Qin Jiushao (circa 1202-1261), a mathematician from the Southern Song Dynasty in China, proposed Qin Jiushao's algorithm for evaluating polynomials in his work "Mathematical Treatise in Nine Sections." The flowchart shown below provides an example of using Qin Jiushao's algorithm to evaluate a polynomial. If the inputs are $n=5, v=1, x=2$, then the flowchart calculates ( )
(A) $2^{5}+2^{4}+2^{3}+2^{2}+2+1$
(B) $2^{5}+2^{4}+2^{3}+2^{2}+2+5$
(C) $2^{6}+2^{5}+2^{4}+2^{3}+2^{2}+2+1$
(D) $2^{4}+2^{3}+2^{2}+2+1$
9. $\mathrm{A}$