[单选题]
99.25: Pioneering radio stati3ac1xyk 2in)uu2lwq; on KFKA started broadcasthy9+k5- kud8lwmsz- uing 78 years ago at 1.31 MH9l u-sdy5hkmk+-8u w zz on the AM dial. What is the approximate length of its radio waves?
A. 23 m
B. 230 m
C. 2300 m
D. 23,000 m
E. $3\times\:10^8m$
