Wo soll das FileMode im Quellcode hin?

[ter]

Frage:
Wo soll das FileMode im Quellcode hin?
Was ist richtig, 1) oder 2) oder 3)?

Code:

var TR : TextFile;
    s : string;
begin
...
1) 
AssignFile(TR, 'D:\Dir\FileName.txt');
FileMode:=fmOpenRead;
Reset(T);
...
2) 
FileMode:=fmOpenRead;
AssignFile(TR, 'D:\Dir\FileName.txt'); 
Reset(T);
...
3) 
AssignFile(TR, 'D:\Dir\FileName.txt'); 
Reset(T);
FileMode:=fmOpenRead;
...
{-}
ReadLN(TR, s);
{-}
CloseFile(TR);
{-}
...

Gruss Terence