Correct Answer: B

Rationale: The first step in the scientific method is to make an observation and ask a question. This is because the scientific method is a systematic process of investigation that begins with observing a phenomenon or asking a question about it. This is followed by formulating a hypothesis (Choice C), designing and conducting an experiment to test the hypothesis (Choice A), and analyzing the results to reach a consensus or conclusion (Choice D). Therefore, choices A, C, and D are incorrect as they represent steps that occur after the initial observation and question.

Correct Answer: A

Rationale: Seafood is a rich source of iodine, essential for maintaining healthy thyroid function and overall metabolic health. While lettuce, broccoli, and pork may contain some iodine, they do not provide as substantial an amount as seafood. Therefore, they are not considered 'good' sources of iodine in comparison.

Correct Answer: B

Rationale: Folate (or folic acid) is crucial for the prevention of neural tube defects during pregnancy.

Correct Answer: B

Rationale: The correct answer is Dysgeusia, which is a persistent and abnormal distortion of the sense of taste. This condition can be triggered by various factors such as medications or certain diseases. Anosmia, choice A, refers to the loss of the sense of smell, not taste. Xerostomia, choice C, is the medical term for dry mouth, which is not specifically related to a distortion of taste. Hypogeusia, choice D, refers to a reduced ability to taste things, which is not the same as a distortion of the sense of taste.

Correct Answer: C

Rationale: The correct answer is C: Choose high-fat meat instead of lean meat. High-fat meats are more calorie-dense than lean meats, which makes them a good choice for increasing calorie intake. This is crucial for patients with stomach cancer who want to avoid weight loss and wasting. Choice A is incorrect because skim milk or water contains fewer calories than whole fat milk. Choice B is also incorrect because peanut butter and nuts are high in calories and therefore should not be avoided when trying to increase calorie intake. Finally, choice D is not a good suggestion to increase calorie intake as alcohol does not provide the necessary nutrients needed for a balanced diet. In fact, excessive alcohol can harm the liver and other organs, and it's not a reliable source of calories.