The terrorists' attack on the world trade center and the pentagon led to many changes in the way people conducted their everyday lives. one outgrowth of this attack was a need to reconnect with old friends through the sending of greeting cards. american greetings announced a significant increase in sales that it directly relates to events on september 11th. for american greetings the terrorists' attacks was an example of a(n):

Opportunity.

Explanation: Since the attack, every year Americans gather at the site of the ancient towers to honor the victims. In addition to the deaths, thousands of people developed cancer and lung disease, due to the toxic cloud that glided for weeks over the south of the city.

People become closer, and the American Greetings took the opportunity.

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