What caused the united states to break its neutrality and enter world war i? a. the assassination of ferdinand b. the constant german sinking of trading vessels resulting in the loss of lives c. the german march across bulgaria d. the surrender of turkey and bulgaria

Over time, historians have changed the ways they study the past because they have: o a. emphasized the study of oral history passed down in communities for generations. o b. started to explore history through the perspectives of many different groups. c. focused on uncovering archaeological evidence rather than analyzing documents. d. largely abandoned studying comparative and cultural history in favor of microhistory.