Which event started world war i?

a the sinking of the lusitania by german u-boats

b the assassination of archduke franz ferdinand and his wife, sophie

c germany’s annexation of alsace and lorraine after the franco-prussian war

d the russian enforcement of pan-slavism throughout slavic nations

e the signing of treaties in 1839 and 1867 to protect belgium’s neutrality

theodore roosevelt challenged william to a duel, whoever won, got their policy sent to congress. it ended up in a stalemate, and both men were injured and sent to the hospital.

the nationalists wanted a strong central government so the new country wouldn't fall apart.

- r3ktforgood ☕

d) iowa i believe is the answer

in 1862, president lincoln's emancipation proclamation opened the door for african americans to enlist in the union army. although many had wanted to join the war effort earlier, they were prohibited from enlisting by a federal law dating back to 1792.

explanation: