In Which of the Following Ways Did Sectarianism Become a Trend

In which of the following ways did sectarianism become a trend in Iraqi politics?

A) Istanbul education and British backing, supported through Faysal, elevated prestige of former Ottoman officials
B) Iraq was the product of the British merging of three distinct Ottoman provinces, all of which contained a number of ethnic and religious groups
C) In the post-Faysal years, army generals such as Bakr Sidqi used violence against minorities to achieve goals of nationalism and pan-Arabism
D) All of these answers are correct