The correct answer is D. Four hijacked airliners were crashed into various targets in the United States, killing nearly 3,000 people.
Step-by-step explanation:
On September 11, 2001, a series of attacks were performed by the terrorist group Al-Qaeda in the U.S. as four airliners from American Airlines and United Airlines were hijacked in the morning of this day, and later they were crashed in key targets that included the pentagon, and the World Trade Center. Additionally, the attacks that occurred this day had a great impact in the U.S. not only because it was one of the major tragedies of the nations as it killed almost 3,000 people, and many resulted injured or died later, but because this determined international relationships with other countries, especially with Afganistan that was invaded later by the U.S. Thus, the option that describes the incidents on September 11 of 2001 is D.