The correct answer is (a).
In February 2015, the terrorist organization Islamic State released a video showing the burning alive of a Jordanian pilot, Muath al-Kasasbeh. Kasasbeh was captured by the Islamic State in December 2014 after his plane crashed while on a mission against the Islamic State in Syria. The Islamic State demanded that Jordan release Sajida al-Rishawi, a female suicide bomber who was sentenced to death for her role in the 2005 Amman hotel bombings, in exchange for Kasasbeh’s life. Jordan refused to release al-Rishawi, and the Islamic State executed Kasasbeh.
The Islamic State’s execution of Kasasbeh was widely condemned by the international community. Jordan responded by carrying out airstrikes against the Islamic State in Syria and Iraq. The United States also carried out airstrikes against the Islamic State in response to Kasasbeh’s execution.
The Islamic State’s execution of Kasasbeh was a reminder of the brutality of the terrorist organization. It also highlighted the dangers of the Syrian Civil War, which has created a vacuum that has allowed the Islamic State to flourish.