The sentence that supports the idea that Arabic influenced other Romance languages to a lesser extent than it did Spanish is:
A. "When the Latin-speaking Roman Empire drove the Moors out of most every country in Europe, they could not conquer the Spanish Moors."
This sentence implies that the unique situation in Spain allowed for a deeper and longer-lasting influence of Arabic on the Spanish language compared to other Romance languages that were less affected by Arabic due to the Moors being driven out earlier.