Question

what is the most likely reason bismarck was named chancellor when king wilhelm i became kaiser of germany?
wilhelm wanted to reward bismarck, who was largely responsible for german unification.
wilhelm did not want bismarck to have as much power as he had when he was prime minister.
wilhelm feared bismarck would turn against germany if he did not receive a position of power in the new government.
wilhelm knew bismarck was popular with both liberals and conservatives, which would help unite the empire.

Explanation:

Otto von Bismarck played a crucial role in the unification of Germany through policies like "Blood and Iron." When Wilhelm I became Kaiser, rewarding Bismarck for his unification efforts (which involved wars against Denmark, Austria, and France to unite German states) by naming him chancellor makes historical sense. Bismarck was not popular with liberals (he suppressed them through Kulturkampf), and there's no indication Wilhelm feared Bismarck's rebellion or was reducing his power (chancellor was a powerful position).

Answer:

Wilhelm wanted to reward Bismarck, who was largely responsible for German unification.