The correct answer is B) He stopped the Muslim advance from Spain to France.
The impact that Frankish leader Charles Martel had on the Christian Europe’s relations with Muslim Spain in the 8th century was that he stopped the Muslim advance from Spain to France.
In the Battle of Tours of 732, Charles Martel who was the ruler of the Frankish territories defeated the Muslims invaders that wanted to occupy Spain. The battle was also known as the Battle of Poitiers because it was fought in a place in the middle of Tours and Poitiers. With that victory, Charles Martel avoided the occupation of the Muslim Army in Western Europe and the spread of Islam in that region.
