Answer:
C: Moors
Step-by-step explanation:
I am not currently learning about the reconquista of Iberia, but I think I can answer this. So, the jews are a small minority, and did not take over Spain and Portugal. The vikings are nordic and are affiliated with Iberia. The Christians are those small kingdoms so nope. Finally the Turks are people in Eurasia/ Eastern Europe except Iberia is in Western Europe. This finally narrows it down to the Moors/Muslims of Spain. They fought back because Muslims had ruled Spain around 200-1000 years.