Read the following context and answer the question.
Context: A Proclamation by the President of the United States of America September 11 , 2001 , was etched into America 's memory when 19 terrorists attacked us with barbarity unequaled in our history . On Patriot Day , we cherish the memory of the thousands of innocent victims lost , extend our thoughts and prayers to their families , and honor the heroic men and women who risked and sacrificed their lives so others might survive . Since 9/11 , we have recognized the threat posed by terrorists to the safety of the American people and worked to protect our homeland by fighting terrorists abroad . We are confronting terrorism by advancing freedom , liberty , and prosperity as an alternative to the ideologies of hatred and repression .
Question: Why did terrorists attack ?
Answer:


None of the above choices .