多種選擇合適間距

Question

我正在使用 package.json 準備一些測試問題enumitem。 MWE 我在這裡發現了 4 年前的問題並對其進行了稍微修改。

\documentclass{article}
\usepackage{amsmath}
\usepackage{enumitem}
\usepackage{multicol}

\newlist{choices}{enumerate}{1}
\setlist[choices]{label*=(\Alph*)}
\newcommand{\choice}{\item}

\SetEnumitemKey{twocol}{
  before=\raggedcolumns\begin{multicols}{2},
  after=\end{multicols}}

\SetEnumitemKey{threecol}{
  before=\raggedcolumns\begin{multicols}{3},
  after=\end{multicols}}

\begin{document}
Which fractions are reduced (one column)?
\begin{choices}
  \choice long answer long answer long answer
   \choice $\dfrac{8}{24}$
   \choice $\dfrac{44}{121}$
   \choice $\dfrac{9}{11}$
\end{choices}

Which fractions are reduced (two columns)?
\begin{choices}[twocol]
   \choice long answer  long answer  long answer
   \choice $\dfrac{8}{24}$
   \choice $\dfrac{44}{121}$
   \choice $\dfrac{9}{11}$
\end{choices}

Which fractions are reduced (three columns)?
\begin{choices}[threecol]
   \choice long answer  long answer  long answer
   \choice $\dfrac{8}{24}$
   \choice $\dfrac{44}{121}$
\end{choices}

\end{document}

我的問題是 - 如何獲得合適寬度的列？長長的答案不應該被打破。我已經閱讀了手冊enumitem，仍然沒有任何想法。請問，有什麼建議嗎？