People left their homelands in the late 1800s for all of the following reasons except what?
a. lots of food and work were available to them
b. political upheaval
c. famine

According to the excerpt, what were the causes of world war 1? check all that apply. 1. russia’s mobilization 2. the spread of disease 3. the assassination of the archduke 4. imperialism and expansion 5. the growth of britain’s naval forces