The cross-section of a tapered tube is shown.
 

What are the pressure readings at both gauge \(A\) and at gauge \(B\) as the air flows through the tube?

\begin{align*}
\begin{array}{l}
\rule{0pt}{2.5ex} \ & \rule[-1ex]{0pt}{0pt} \\
\rule{0pt}{2.5ex} \textbf{A.} \rule[-1ex]{0pt}{0pt} \\
\rule{0pt}{2.5ex} \textbf{B.} \rule[-1ex]{0pt}{0pt} \\
\rule{0pt}{2.5ex} \textbf{C.}\rule[-1ex]{0pt}{0pt} \\
\rule{0pt}{2.5ex} \textbf{D.}\rule[-1ex]{0pt}{0pt} \\
\end{array}
\begin{array} {|c|c|}
\hline
\rule{0pt}{2.5ex} \textit{Pressure at gauge A} \rule[-1ex]{0pt}{0pt} & \textit{Pressure at gauge B} \\
\hline
\rule{0pt}{2.5ex} \text{High} \rule[-1ex]{0pt}{0pt} & \text{High} \\
\hline
\rule{0pt}{2.5ex} \text{High} \rule[-1ex]{0pt}{0pt} & \text{Low} \\
\hline
\rule{0pt}{2.5ex} \text{Low} \rule[-1ex]{0pt}{0pt} & \text{Low} \\
\hline
\rule{0pt}{2.5ex} \text{Low} \rule[-1ex]{0pt}{0pt} & \text{High} \\
\hline
\end{array}
\end{align*}