Team Spain performed a difficult vaulting routine without error and celebrated their victory. Identify the case of the underlined pronoun as well as the antecedent to which it refers.

The only pronoun in the sentence is 'their,' so it must be the underlined pronoun. It's used to identify ownership, so its case is Possessive. The antecedent is the word which the pronoun refers to. In this case, the antecedent is Team Spain.