[Tex/LaTex] Multicolumn table with different alignments

Question

I want to draw the following multiple column table in latex. The headings are centrally aligned and the other text is left aligned. How to do this? Here all fields such as One, Two etc may contain arbitrary amount of text.

My current attempt is as below. I further want to have:

(a) Two and Three split in the middle with respect to the text in column one.

(b) All text except headings to be left aligned

(c) A straight line between Two and Three

\documentclass{article}
\usepackage{blindtext}
\begin{document}
\begin{tabular}{|p{5cm}|c|c|c|}
\hline
\textbf{A} & \textbf{B} & \textbf{C} & \textbf{D}\\
\hline
\blindtext & \begin{tabular}{@{}c@{}}Two \\ Three\end{tabular} & Four & Six
\end{tabular}
\end{document}

Answer 1

\documentclass{article}
\usepackage{multirow}
\usepackage{multicol}
\usepackage{blindtext}
\begin{document}
\begin{tabular}{|p{5cm}|l|l|l|}
\hline
\multicolumn{1}{|c}{\textbf{A} }& \multicolumn{1}{|c|}{\textbf{B} }& \multicolumn{1}{c}{\textbf{C} }& \multicolumn{1}{|c|}{\textbf{D} }\\
\hline
\multirow{2}{*}{One} & Two  & Four & \multirow{2}{*}{Six}  \\ \cline{2-3}
 &  Three & Five & \\ \hline
Seven& Eight & Nine & Ten \\ \hline
\end{tabular}
\end{document}