Answer:
Option (B)
Step-by-step explanation:
Al-Qaeda is referred to the Militant Islamist organization whose founder was Osama Bin Laden. This organization was introduced in the year 1980 and their main objective was to organize and help the Muslims to brawl against the Soviet Union.
The 9/11 attack was planned and initiated by the Al-Qaeda where 4 aeroplanes were hijacked and carried out attacks against the targets that were set in the U.S. In this attack, 19 militants of Islamic terrorist group were associated who killed about 3,000 people.
The Al-Qaeda terrorist group claimed the credit for this attack.
Thus, the correct answer is option (B).