Respuesta :
Based on the given sentence above, the pronoun used is the word "it", and the case of this pronoun is nominative case. In the sentence, the antecedent that is referring to is ambiguous or vague, meaning, there is no clear noun that this pronoun is identifying to. The subject "vaulters" is also not antecedent since it is referring to something that the vaulters are trying to win. Hope this answer helps.
Answer:
The pronoun "it" is in the objective case and refers to an unknown antecedent. The indefinite reference may be revised as follows to add clarity to the sentence:
The seasoned equestrian vaulters were determined to win the international competition.
Explanation:
on edg. 2020