_______ the normal condition, he can read 150 words a minute.   

A、<span style=";font-family:&#39;Times New Roman&#39;;font-size:16px">Below&nbsp;</span></p><p></p>

B、<span style=";font-family:&#39;Times New Roman&#39;;font-size:16px">Under&nbsp;</span> </p><p></p>

C、<span style=";font-family:&#39;Times New Roman&#39;;font-size:16px">With</span></p><p></p>

D、<span style=";font-family:&#39;Times New Roman&#39;;font-size:16px">&nbsp;In &nbsp;</span></p><p></p>