Question

What lead to the Austria's declaration of war? The assassination of the heir to the Austrian throne. The assassination of Serbia's next ruler by Austrian forces. The attempted destruction of Germany's capital. The infiltration of Austria-Hungary into Russian colonies.

Answer 1

The assassination of the heir to Austrian throne

hope this helps

Answer 2

The correct answer is A) the assassination of the heir to the Austrian throne.

The reason that led to Austria´s declaration of war was the assassination of the heir to the Austrian throne.

Austria-Hungary declares war on Serbia on July 28, 1914. Archduke Franz Ferdinand and his wife were assassinated in Sarajevo in June 1914.  That incident and the official declaration of war, represented the beginning of World War I.