Final answer:
The three groups that attacked Europe during the late ninth century were the Saracens, the Magyars, and the Vikings.
Step-by-step explanation:
The three groups that attacked Europe during the late ninth century were the Saracens, the Magyars, and the Vikings.
The Saracens were Arab invaders who attacked southern European lands and even conquered Sicily. The Magyars were a group of steppe raiders from central Asia who swept across Europe and settled in present-day Hungary. The Vikings, also known as the Norse, attacked northern Europe from Scandinavia and became the great naval power of Europe at the time.