Conflict between Springer document class and \cline

Question

So, I am trying to write down a table in the "sn-jnl" document class from Springer: when I do it it "article" instead I get exactly what I want:

\documentclass{article}
\usepackage{multirow}
\begin{document}
\begin{tabular}{|c|c|c|}
\hline
    \multirow{2}{*}{A} & B & C \\cline{2-3}
     & D & E\
     \hline
\end{tabular}
\end{document}

returns

But, once I use the document class I actually want...

\documentclass[sn-mathphys-num]{sn-jnl}
\usepackage{multirow}
\begin{document}
\begin{tabular}{|c|c|c|}
\hline
    \multirow{2}{*}{A} & B & C \\cline{2-3}
     & D & E\
     \hline
\end{tabular}
\end{document}

returns an "Undefined control sequence" for \cline: why is that? I can see in the file for the "sn-jnl" class the line

\let\cline\cmidrule

but I am not competent enough with LaTeX to know what that means, or more importantly how to circumvent it.

So, how do I use \cline with the document class "sn-jnl"?

Edit:

@cabonah pointed me to Latex Table Missing Border Lines, which suggests a few possible solutions that have not worked with me.

• Requiring the package "booktabs" before declaring the document class returned an "Undefined control sequence" for \begin{document};
• storing the original macro for \cline before declaring the document class resulted in the same problem;
• all other solutions would imply rewriting my whole table, what I think will be the unfortunate solution in the end...

Answer 1

With the sn-jnl document class, you (a) shouldn't use any vertical rules in tables, and (b) replace all instances of \cline with \cmidrule and all instances of \hline with -- depending on the context -- either \toprule, \midrule, or \bottomrule.

Aside: The first argument of \multirow need not be integer-valued.

\documentclass[sn-math]{sn-jnl}
\usepackage{multirow}
\begin{document}
\begin{tabular}{@{} ccc@{}}
\toprule
    \multirow{2.6}{*}{ABC} 
       & D & E \
       \cmidrule(l){2-3}
       & F & G \
    \bottomrule
\end{tabular}
\end{document}