Which event directly led to the beginning of world war 1

answer is b shrapnel injuries

answer; /// i do believe the correct answer is ( a

i do believe   by (keeping an organized record of all sources he or she referenced)good luck.

explanation:

jacksonian era promoted strength of the presidency and executive branch at the expense of congress. it also sought to broaden the public's participation in government. the jacksonian's demanded to have elected judges, instead of appointed judges, and rewrote many state constitutions to reflect the new values. hope this ! if you did find it would you mind giving me brainliest? : )