Correct Answer: A

Rationale: The correct answer is A, weight loss. Metformin is commonly associated with weight loss as a side effect rather than weight gain. Metformin works by decreasing glucose production in the liver and improving insulin sensitivity, which can lead to weight loss. Choices B, C, and D are incorrect because weight gain, drowsiness, and hypertension are not typically common side effects of metformin.

Correct Answer: B

Rationale: The correct answer is B. Blizzards and volcanic eruptions are both examples of natural disasters caused by natural forces such as extreme weather conditions and tectonic activities. On the other hand, structural collapse is typically a result of man-made factors like poor construction or maintenance. Therefore, choices A, C, and D are incorrect as only blizzards and volcanic eruptions are classified as natural disasters.

Correct Answer: A

Rationale: The correct answer is to secure a clean container before sputum collection. This is essential to prevent contamination of the specimen, ensuring accurate test results and avoiding the introduction of external particles or bacteria. Choice B is incorrect because discarding the container if the outside becomes dirty is not necessary; the cleanliness of the inside is crucial. Choice C is incorrect as rinsing the client's mouth with Listerine before collection may introduce unwanted substances that can affect the test results. Choice D is incorrect as the amount of sputum required can vary depending on the test, and specifying a specific amount without medical guidance is not appropriate.

Correct Answer: C

Rationale: The correct answer is C, Broccoli. Broccoli is a good source of potassium. Increased excretion can be related to the dietary intake of nutrients like potassium. Choice A, Potassium, is a nutrient obtained from broccoli but is not directly related to increased excretion. Choice B, Increased excretion, is a process rather than a nutrient obtained from broccoli, making it an incorrect choice.

Correct Answer: C

Rationale: Most peptic ulcers occur in the duodenum, particularly in cases of duodenal ulcers. The correct answer is the duodenum because it is the most common site for peptic ulcers to develop. Peptic ulcers rarely occur in the esophagus and jejunum, making choices A, B, and D incorrect.