How did sanitation influence city planning during the bronze age in the indus river valley?

Political rights for women grew most rapidly on the western frontier primarily because (1) the settlers were influenced by native american indian societies (2) women greatly outnumbered men in the west (3) pioneer life often required men and women to share responsibilities equally (4) immigrants settling in the west brought ideals of gender equality from europe

Which would be good historical evidence when studying manifest destiny?

What are three supporting points as to why opium was wrong in the chinese trade? why should it have stopped? (opium wars)