Directions: Each item consists of a sentence with an underlined word followed by four words. Select the word that is opposite in meaning to the underlined word. The student's striking audaciousness disturbed long-standing social hierarchies on campus.

Step-by-step solution

The word 'audaciousness' refers to a willingness to take surprisingly bold risks, meaning boldness or fearlessness. The opposite of this is 'timidness', which means a lack of courage or confidence. Therefore, 'timidness' is the correct antonym. Answer: timidness