答案1
像这样?
\documentclass{article}
\usepackage{amssymb}
\usepackage{tasks,calc}
\settasks{label = \protect\circled{\textbf{\sffamily\Alph*}},
label-width = 2em,
label-offset = 2pt,
item-indent = 2em+2pt}
\usepackage{tikz}
\newcommand*\circled[1]{\tikz[baseline=(char.base)]{
\node[shape=circle,draw,inner sep=1pt] (char) {#1};}}
\begin{document}
\noindent
This is some text followed by four options.
\begin{tasks}(2)
\task $\displaystyle\exists x\in\mathbb{R}:\frac{x^2-1}{x-1}=x+1$.
\task $\displaystyle\forall x\in\mathbb{R}:\frac{x^2-1}{x-1}>x+1$.
\task $\displaystyle\forall x\in\mathbb{R}:\frac{x^2-1}{x-1}=x+1$.
\task $\displaystyle\exists x\in\mathbb{R}:\frac{x^2-1}{x-1}>x+1$.
\end{tasks}
\end{document}