Each general statement below is followed by several examples. Select the letter of the example that does not clearly illustrate the generalization. Throughout history, people have built huge walls to separate two populations.

A) The most famous example is the 4,000-mile-long Great Wall of China, built in 200 B.C. by the Ming Dynasty to protect against raids by Mongol and Turkic tribes.
B) The Roman Empire built Hadrian's Wall across the width of Britain to protect its territory against Scottish tribes.
C) The Vietnam Veterans Memorial in Washington, D.C., is known as "The Wall."
D) Before Germany's Berlin Wall was demolished in 1989, it had divided West Berlin from East Berlin for twenty-eight years.