rasberrytickleb7640 rasberrytickleb7640 03-10-2019 History contestada 2 Points What is one of the defining characteristics of the modern era? O A. Countries are better able to build strong economies without trading with their neighbors. O B. Human actions have less of an impact on the environment than they did during other eras. C. Most countries have done away with social and economic hierarchies. D. Interactions and exchange between cultures have become easier than ever before. PREVIOUS