which city became the capital of the mongol empire?\n○ baghdad\n○ karakorum\n○ beijing\n○ kiev

Brief Explanations:

To determine the capital of the Mongol Empire, we analyze each option:

• Baghdad was the capital of the Abbasid Caliphate, not the Mongol Empire.
• Karakorum (also spelled Karakorum) was the capital of the Mongol Empire during its early period.
• Beijing became significant later, especially for the Yuan Dynasty (a successor state), but not the original capital of the Mongol Empire.
• Kiev was a major city in Kievan Rus', unrelated to the Mongol Empire's capital.

Answer:

B. Karakorum