Answer - C - Bismarck's greatest fear for Germany was that France and Russia would form a military alliance.
Key Takeaway: During the late 19th century, Otto von Bismarck was a prominent statesman in Germany/Prussia. As the Prime Minister of Prussia (from 1862-1890), von Bismarck oversaw the unification of Germany. Ruling as the "Iron Chancellor," von Bismarck worked tirelessly to promote Germany's military power. He feared that Russia and France would form a military alliance and threaten Prussia's rise to power.