\DeclareOption{naustrian}{\def \exsheetgerman{}}
\DeclareOption{showanswers}{\def \exsheetshowanswers{}}
\DeclareOption{exam}{\def \exsheetexam{}}
\DeclareOption{naustrian}{\def \exsheetgerman{}}
\DeclareOption{showanswers}{\def \exsheetshowanswers{}}
\DeclareOption{exam}{\def \exsheetexam{}}