Answer:bad working conditions
Explanation:
Taking an educated guess here -- I think it would be 1, 3, and 4 which all seem pretty reasonable.
Answer:
The assassination of the heir to the heir to the Austro-Hungarian throne, Archduke Franz Ferdinand, and his wife, Sophie. On June 28, 1914, the couple paid a state visit to Sarajevo, the capital of Bosnia.
Explanation: