How did legalism shi huangdi centralize qin power? select all that apply. (2 points)
it declared that man's nature is good and is best governed by a virtuous and fair ruler.
it emphasized that the strength of a ruler rather than his goodness was most important.
it maintained that only a greedy ruler could set a strong and convincing example for people.
it asserted that people are greedy, and only tough laws and punishments can maintain order.