The Term Barid Refers to Which of the Following

Multiple Choice

The term barid refers to which of the following?

A) the main advisor of the Abbasid monarch
B) the top religious position in the Abbasid Caliphate
C) the intelligence network set up by the Abbasids to stay informed about matters throughout the vast empire
D) an underground network of rebellious factions that sought to overthrow the Abbasids and restore the Umayyads