Answer: Heyo Kenji Here! Here's your answer- A(n) _______________ pronoun does not clearly refer to a specific antecedent. (vague).
Explanation: Hope this helps!
Have an awesome day!
- Kenji
You can paraphrase information at any point basically
Sanchez Aluminum is a front for O Palácio, Brazil's largest and most powerful organized crime syndicate, so the answer is
B) O Palácio
P.S. a front is a person, group, or thing used to mask the identity or true character or activity of the actual controlling agent.