What important victory did one founder of the Carolingians achieve?

He convinced all Europeans to convert to Christianity.
He won the title of first warrior king of France.
He fought to make Spain the most powerful country in Europe.
He defeated a Muslim invasion from Spain

He defeated a Muslim invasion from Spain

Explanation:

D. He defeated a Muslim invasion from Spain

Explanation:

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changes in factors like average income and preferences can cause an entire demand curve to shift right or left. this causes a higher or lower quantity to be demanded at a given price. demand curves relate the prices and quantities demanded assuming no other factors change. it is important for consumers to know this information, because it is crucial for them to know what they can afford and can't afford. i hope this .