The answer is "D) September 11th Terrorist Attacks, 2001 ".
The September 11 attacks (additionally alluded to as 9/11) were a progression of four coordinated terrorist attacks by the Islamic terrorist group al-Qaeda against the United States on the morning of Tuesday, September 11, 2001. The assaults killed 2,996 individuals, harmed more than 6,000 others, and caused at any rate $10 billion in foundation and property damage. Additional individuals kicked the bucket of 9/11-related malignant growth and respiratory ailments in the months and years following the assaults.