In the Groundwork, Kant suggests the fundamental principle of morality can be expressed as?
1) Act only on that maxim through which you can at the same time will that it should become a universal law
2) Act only on that maxim through which you can at the same time want that it should become a universal law
3) Act only on that maxim through which you can at the same time desire that it should become a universal law
4) Act only on that maxim through which you can at the same time wish that it should become a universal law