When was this source written or created?

Which of these was an accomplishment of the han dynasty? the invention of the seismograph finding a water passage to europe the invention of the ballpoint pen the invention of the abacus

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

Which of these statements accurately describes joseph stalin? check all that apply