The correct option is B Black hand
The Sarajevo Crisis refers to the issues that arose due to the assassination of the Austrian Prince Archduke Francis Ferdinand. He and his wife Sophie were shot dead on June 28, 1914. They were assassinated by Gavrilo Princep, a 19-year-old Serbian. The assassination was orchestrated by a secret society of terrorists known as the Black Hand. Schneiders’ in France was a high-profit armament industries of the time.