September 11, 2001, led many people around the world in shock by the attacks were condemned by them.
The 9/11 attack on US, where four coordinated terrorist attacks were done by the al-Qaeda, an Islamic terrorist group. It shook the whole world as, 2996 people lost their lives.
As the result of this, the US government launched the war against the terror. Many people around the world were shocked by the events and condemned the attacks immediately after the attacks of September 11, 2001
Therefore, option b, rightly explain the effect of September 11, 2001, attack on the people around the world.
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