Respuesta :
Answer:
d.they were grounded and unable to operate for several days
Explanation:
because some places got destroyed and the government had to close stuff for a lot of days
The September 11th attacks on US airlines led to decision to be grounded and been unable to operate for several days.
What is the September 11th attacks?
This was a terrorist attacked done by Al-Qoida group that crashed the American Airlines Flight into the northern facade of the World Trade Center's on September 2001.
Because the Trade center got destroyed and lot of loss of life, this contribued to grounding of airline operation.
Therefore, the Option D is correct.
Read more about the attacks
brainly.com/question/542897
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