Correct Answer: D

Rationale: The correct answer is D: Flexible. Plastic is a material that can be easily molded or shaped, known for its flexibility. It can bend and stretch without breaking, making it versatile and durable. Choices A, B, and C are incorrect because plastic is not primarily associated with being mechanical, authentic, or durable, but rather with its ability to be shaped and its flexibility.

Correct Answer: B

Rationale: The word 'deferentially' means showing respect or submission to someone. Therefore, the closest synonym for 'deferentially' is 'respectfully' as it reflects the attitude and behavior of showing respect towards others. The other choices are incorrect: 'Imperfectly' means with flaws or errors, 'Competently' means having the necessary ability or skills, and 'Energetically' means with energy or enthusiasm, none of which capture the respectful connotation of 'deferentially.'

Correct Answer: B

Rationale: A treatment that is detrimental is considered destructive because it causes harm or damage rather than benefiting the individual. In this context, 'detrimental' implies that the treatment has negative effects and is harmful rather than helpful. Choices A, C, and D are incorrect because a detrimental treatment is not risk-free, agonizing, or effective; instead, it is harmful and damaging.

Correct Answer: C

Rationale: The phrase 'monitor progress' in this context means to observe or keep track of how the pilot program is developing or improving. It involves regularly reviewing reports and conducting inspections to ensure that things are progressing as expected. 'Keep an eye on improvement' accurately describes the action of monitoring progress in this scenario, making it the correct choice. Choices A, B, and D are incorrect as they do not capture the essence of overseeing development and ensuring improvement.

Correct Answer: A

Rationale: In this sentence, the word 'prognosis' refers to the expected outcome or forecast for the accident victims. It indicates what is likely to happen in terms of their recovery or overall condition following the accident. Therefore, the correct meaning of the underlined word is the expected outcome, which is option A. Choices B, C, and D are incorrect because 'prognosis' does not refer to a treatment option or fabrication.