According to the Global Terrorism Index 2020, which country was affected most by Terrorism?

According to the Global Terrorism Index 2020, which country was affected most by Terrorism?

A. Afghanistan
B. Iraq
C. Nigeria
D. Syria

Conflict continues to be the primary driver of terrorist activity for the countries most impacted by terrorism, according to the 2020 Global Terrorism Index.
Five of the ten countries are classified as being in a state of war: Afghanistan, Nigeria, Syria, Somalia and Yemen.