Question

What happened in 2014 that made the ongoing civil war in Syria even more complicated A The United States attacked a Syrian Air Base B The Arab spring led to demonstration in syria assad government used chemical weapons D ISIS launched an attack on Syria

Answer 1

In 2014, the ongoing civil war in Syria became even more complicated primarily due to **D: ISIS launched an attack on Syria**. The rise of the Islamic State of Iraq and Syria (ISIS) added a new and significant layer of complexity to the conflict, as the group seized territory in both Syria and Iraq, altering the dynamics of the war and leading to new military interventions and responses from various actors, including the United States and other nations.

While the other options you provided are related to the broader context of the Syrian conflict, the emergence and activities of ISIS in 2014 were particularly pivotal in intensifying and complicating the civil war.