In 1451 the King of Spain Declared the Blood Purity

In 1451 the king of Spain declared the blood purity statute that declared Jewish converts could not hold office in the Catholic Church. What did this assert about Jews that would later become an accepted belief?

A) Jewish people are to be considered a racial group rather than a religious group.
B) Jewish people are not allowed to convert to other religions.
C) Judaism is first and foremost a religion and not a race of people.
D) Jewish people are a dominant race and are a threat to world dominance.