Answer:
Chief Muslim leaders after Muhammad's death were referred to as Caliphs. The era of the Abbasid Caliphs' construction and rule of Baghdad is known as the Golden Age of Islam. It was an era when scholarship thrived.
Explanation:
The answer is most likely a, but if not, then d is correct
The correct answer is D) Joseph McCarthy.
McCarthy was a Senator from the state of Wisconsin during the 1950's. At this time, McCarthy claimed to have a list of 207 names of individuals within the US government that were communists. This accusation was seen as an immediate threat to American society, as the US was trying to stop the spread of communism on a global scale. The accusations raised fear and suspicion throughout American society. This era is now known as the second Red Scare.