\documentclass{article}
\begin{filecontents}{mypkg.sty}
\DeclareKeysOptions{
load-option-A .store = \my@A ,
load-option-A .usage = load ,
load-option-B .store = \my@B ,
load-option-B .usage = load ,
general-option-C .store = \my@C
}
\ProcessKeysOptions
\newcommand\mypkgtest{%
\begingroup
\edef\x{\my@A:\my@B:\my@C}%
\show\x
\endgroup
}
\end{filecontents}
\input{test2e}
\START
\AUTHOR{Joseph Wright}
\usepackage[load-option-A = 111]{mypkg} % 1
\mypkgtest