1957 AHSME Problem 28

If a and b are positive and a\neq 1,\,b\neq 1, then the value of b^{\log_b{a}} is:

\textbf{(A)}\ \text{dependent upon }{b} \qquad \textbf{(B)}\ \text{dependent upon }{a}\qquad \textbf{(C)}\ \text{dependent upon }{a}\text{ and }{b}\qquad\textbf{(D)}\ \text{zero}\qquad\textbf{(E)}\ \text{one}

Full credit goes to MAA for authoring these problems. These problems were taken on the AOPS website.