The correct answer is A) Abrahamic religions were free to practice their religious beliefs in relative peace.
During the "Golden Age of Islam," the statement that was MOST true of non-Muslims living under Abbasid rule is "Abrahamic religions were free to practice their religious beliefs in relative peace."
When historians refer to the "Golden Age of Islam," they are talking about the period in which Muslim culture, art, economy, and science lived their best moments. Historians agree that this period started in the 8th century during the rule of caliph Arun al-Rashid of Abbasid, and ended in the 14th century during the period of Mongol invasions.