Answer:
The Catcher in the Rye takes the loss of innocence as its primary concern. Holden wants to be the “catcher in the rye”—someone who saves children from falling off a cliff, which can be understood as a metaphor for entering adulthood
Adjective clauses usually start with the words: that, when, where, who, whom,whose, which, and why. also it's function as an adjective answers the questions "what kind?", "how many?" or "which one?"
SO the answer is A, because it uses the word which, and answers the question "which one?"
Speech bubbles usually represent quotations, or in this case, sarcasm.
How do we start the problem? What is it asking?