What is the main idea of the passage?

Correct Answer: B

Rationale: The passage discusses the revision of the food pyramid specifically to address the unique dietary needs of seniors. It emphasizes how the changes were made based on ongoing research and analysis, indicating a broader focus on senior nutrition rather than just individual nutrients or exercise. Thus, option B captures the essence of the passage as it succinctly summarizes the main idea.

Correct Answer: C

Rationale: The passage lists important nutrients for seniors, including fiber, calcium, vitamin D, and B12, while exercise is also discussed as crucial for health. However, nitrates are not mentioned at all, making option C correct since it stands out as the only nutrient not discussed in the context of seniors' health

Correct Answer: B

Rationale: The study outlined in the passage indicates that children who lack adequate sleep are at a higher risk for behavioral and physical issues, such as obesity and attention disorders. This conclusion is derived from the evidence provided in the passage, suggesting a direct link between sleep deprivation and negative outcomes, thus supporting option B..

Correct Answer: A

Rationale: The statement that the connection between sleep and weight should be explored reflects a personal viewpoint rather than an objective fact. It indicates a belief that further research is warranted to understand this relationship better, making it an opinion and distinguishing it from the other factual statements presented in the passage.

Correct Answer: B

Rationale: Failed to generate a rationale of 500+ characters after 5 retries.