Question

during the mid-twentieth century, a sense of nationalism grew in the middle east and became known as
sectarianism.
pan-arabism.
arab unification.
fundamentalism.

Explanation:

Pan-Arabism was the mid-20th century Middle Eastern nationalist movement focused on uniting Arab peoples under a shared identity. Sectarianism refers to division along religious lines, Arab unification is a goal of pan-Arabism rather than the named movement, and fundamentalism is a religiously conservative ideology unrelated to this nationalist trend.

Answer:

B. pan-Arabism.