. During World War I, developments in military technology led to (1) an early victory by the Allied powers
(2) the establishment of industrial capitalism
(3) the use of poisonous gas and submarine attacks
(4) an increase in ethnic tension in western Europe

Whether or not a given study has the possibility of causing harm to participants:

Chen's research team randomly assigned some newborns and their mothers either to a breastfeeding promotion group (where breastfeeding was encouraged, but not required) or to a normal pediatric care group (where breastfeeding was neither encouraged nor discouraged). which research method did they use?

Describe two reasons that cities developed along rivers during the industrial revolution. for full credit, your response must be at least 2 complete sentences.