Which statement best evaluates Machiavelli's argument?

Machiavelli ineffectively argues that new princes
should do everything in their power to guard their
kingdoms.

Machiavelli effectively argues that new princes must
be cruel and cautious in order to protect their new
kingdoms.

Machiavelli effectively argues that new princes
should not be cruel and should proceed carefully in
their new kingdoms.

Machiavelli ineffectively argues that new princes
should not show fear, but should be self-confident and
intolerable.