According to Kant, "As Man Is a Free (Moral) Being

Multiple Choice

According to Kant, "as man is a free (moral) being, the notion of duty can contain only self-constraint (by the idea of the law itself) , when we look to the internal determination of the will (the spring) , for thus only is it possible to combine that constraint (even if it were external) with the freedom of the elective will. The notion of duty then must be an ..."

A) abstract one.
B) original one.
C) ethical one.
D) internal one.