On What Grounds Did the Supreme Court Decide in Favor

On what grounds did the Supreme Court decide in favor of the slaves on the Amistad?

A) They had reached British soil and were therefore emancipated.
B) They were free according to the provisions of New York State law.
C) They had been brought from Africa in violation of the international ban on the slave trade.
D) As they had not yet been purchased by any white owner, they were still free men.
E) They shared the same constitutional rights as any American.