Passage Cynthia was a shy girl. She believed that she was plain and untalented. One day her teacher ordered the entire class to show up for audition for the school play. Cynthia nearly died of fright when she was told that she would have to stand on stage in front of the entire class and deliver dialogues. The mere thought of it made her feel sick. But a remarkable transformation occurred during the audition. A thin, shy girl, her knees quaking, her stomach churning in terror, began to stun everyone with her excellent performance. Her bored classmates suddenly stopped their noisy chat to stare at her slender figure on the state. At the end of her audition, the entire room erupted in thunderous applause. Cynthia's knees were quaking because

The passage states that Cynthia "nearly died of fright when she was told that she would have to stand on stage in front of the entire class and deliver dialogues." It then describes her "knees quaking, her stomach churning in terror." This clearly links her terror and physical reactions to the act of performing in front of her classmates. Analyzing the options: A) she felt nervous and shy: While true that she was nervous and shy, this is a general description of her state. The passage provides a more specific reason for her extreme terror and quaking knees: performing in front of a specific audience (her classmates). B) the teacher scolded her: There is no mention in the passage of the teacher scolding Cynthia. C) she was very thin and weak: The passage mentions she was "thin" but explicitly links her quaking knees to "terror," not physical weakness. People of any build can experience quaking knees due to extreme fear or nervousness. D) she was afraid of her classmates: The passage states her fright was triggered by having to perform "in front of the entire class." This implies a fear of public scrutiny or judgment from her peers, which is captured by being afraid of her classmates as an audience. This fear is the direct cause of her terror and the resulting quaking knees. Therefore, the most accurate and specific reason for her knees quaking in this context is her fear of performing in front of her classmates. The final answer is D