How did Germany’s alliance with Austria affect the reaction to the assassination of Francis Ferdinand?

A. Germany gave Austria a “blank check,” or permission to send a harsh ultimatum to Serbia.
B. When Serbia declared war on Austria it also declared war on Germany.
C. Germany sent a list of demands to Serbia demanding the end of all anti-Austrian agitation.
D. Austria negotiated with Serbia to find and punish any Serbian official involved in the murder plot.

A. Germany gave Austria a “blank check,” or permission to send a harsh ultimatum to Serbia.