(2011•山东)优先编码器74LS147输入情况为：\( \stackrel{-}{{I}_{1}}\) \( \stackrel{-}{{I}_{3}}\) \( \stackrel{-}{{I}_{5}}\) \( \stackrel{-}{{I}_{8}}\) \( \stackrel{-}{{I}_{9}}\)，为1、\( \stackrel{-}{{I}_{2}}\) \( \stackrel{-}{{I}_{4}}\) \( \stackrel{-}{{I}_{6}}\) \( \stackrel{-}{{I}_{7}}\)，为0时，则编码器输出为( )
A.0110
B.1000 C.0111 D.1001
