奴隶制是一种非常残酷的剥削制度,下列能充分体现这种残酷性的国君有( )
A:尧、舜、禹
B:禹、汤、周武王
C:桀、汤、纣王
D:桀、商纣王、周厉王
—Whose book is this? There is no name on it. —Let me see. Oh, it's . I lost it a few days ago.