Why was otto von bismarck nicknamed the \"blood and iron chancellor\"? . a. he suffered from an iron deficiency disease.. b. he received a disabling wound in battle.. c. he put political enemies into prison.. d. he preferred to use armed force.

The correct answer among all the other choices is D. He preferred to use armed force. Otto von Bismarck was nicknamed the "Blood and Iron Chancellor" because he preferred to use armed force. Thank you for posting your question. I hope this answer helped you. Let me know if you need more help.