Answer:
The correct answer is option B. who is in the circus.
Explanation:
Adjective clauses give us a more specific description than the adjectives do. They also contain a subject and a verb.
To identify an adjective clause we must verify that it begins with who, whom, that, whemn, where, etc.
That is why, of all the options given, the most appropriate is the option B. who is in the circus.
