What Are the Main Contributing Factors to the Increasing Religiosity

What are the main contributing factors to the increasing religiosity levels in parts of the world besides the United States, especially in the Middle East and Russia?

A) All countries with rising religiosity levels have state-mandated religions.
B) All countries with rising religiosity levels teach religion in the schools and universities.
C) Religious people and societies have more children than the irreligious; also, the influence of religion is rising among political and military forces.
D) Religiosity levels in other parts of the world are not really on the rise; they just appear to be rising because of growing secularization in the rest of the world.