All I want for Christmas is a "wrong answer" buzzer for my classroom

Question: Explain and describe why the ancient kingdoms of Africa have disappeared?

Answer #1: "The ancient Kingdoms of Africa have disappeared. They have because the fall of the people. Also the empire."

Answer #2: "The ancient kingdoms of Africa have disappeared because of the war. Many people started to fight over traded goods. Or split in the religion, and many kingdoms move to different areas."

Answer #3: "The kingdoms of Africa have disappeared because there wasn't enough $ and the armys kept invading them."

In case you were wondering "About the empire" is my favorite part; makes me laugh out loud every time I look at it.