Final answer:
Copenhagen finished third in the horse race.
Step-by-step explanation:
To determine where Copenhagen finished, we need to analyze the given information. Hill Royal came in ahead of Trigger, and Hill Royal finished after Black Beauty. This means that Black Beauty finished before both Trigger and Hill Royal.Next, the information tells us that Copenhagen beat Black Beauty but finished after Bucephalus. This implies that Bucephalus finished before both Copenhagen and Black Beauty.
Based on this information, we can conclude that Copenhagen finished third in the horse race.