A) Because it is the only actual conflict. The rest are just tensions. C could technically be considered a conflict, but there was no armed fighting over the issue. It must be noted that the Taliban is an extremist group that is not representative of Islam. Their kind of like Westburo Baptist Church, or American pastors preaching hate against other people, which is specifically in violation with the Bible. I guess B could be considered a religious conflict, but King Muhammad IV of Morocco took in 5 million Jews during the Holocaust, and Jews were welcomed to settle in Israel until they started crowding out the Palestinians, and trying to exert power over them. If your teacher is being fair, that should be considered a social conflict. Hinduism being the majority religion of India isn't a conflict. Hindus clashing with Muslims and Christians would be a conflict, but thats not the option provided. Sunnis worrying about there being a Shia government in Iraq isn't a conflict either. A war between the Sunni's and Shia (although both groups are forbidden to have devisions or to kill another person) would be an example of a conflict. This has happened many times before, but if the Sunnis are just worried, it's not a conflict. I hope that helps you :)