Answer:
im ppretty sure its c dont be mad if im wrong let me know if im wrong plss so i can know
Explanation:
The battle you are referring to is actually called the Battle of the Ironclads. In this battle, it was the Merrimac (from the Confederacy) versus the USS Monitor (from the Union). This was the first battle between iron-fortified vessels in the Civil War. This battle ended up in a draw but represented a new form of fighting that both the Union and Confederacy had to be ready for.
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The correct answer is: "The emperor should ask family members to become involved in governing the empire"
Taizong wants the emperor to continue his reign, but he wants him to also let his family reign as well so that governing the huge country will be easier.