Correct Answer: A

Rationale: The correct answer is A: 'Use three-pronged grounded plugs.' This is important in preventing electrical fires as it provides a grounded connection, reducing the risk of electrical malfunctions. Choice B is incorrect because covering extension cords with a rug can lead to overheating and increase the risk of fire. Choice C is also incorrect as tingling sensations around a cord indicate an electrical hazard, not proper functioning. Choice D is incorrect as pulling the cord to remove a plug can damage the cord, leading to potential electrical dangers.

Correct Answer: C

Rationale: The correct answer is C because cleaning a cat's litter box during pregnancy can increase the risk of toxoplasmosis, which can be harmful to the developing fetus. Choice A is correct as the statement indicates understanding of the chickenpox transmission timeline. Choice B is also correct as high folic acid foods are beneficial during pregnancy. Choice D is correct as washing hands with hot water after gardening helps prevent infections.

Correct Answer: C

Rationale: The correct answer is C: Tachycardia. Tachycardia is a common sign of dehydration because the body tries to compensate for the reduced fluid volume by increasing the heart rate. Bradycardia (choice A) is not typically seen in dehydration as the body tries to maintain perfusion. Increased skin turgor (choice B) is actually a sign of dehydration, but tachycardia is a more specific finding. A bounding pulse (choice D) is associated with conditions like hyperthyroidism or aortic regurgitation, not dehydration.

Correct Answer: C

Rationale: The correct answer is C, 'Serum creatinine 3.5 mg/dL.' An elevated serum creatinine level indicates worsening kidney function and impaired renal clearance, which should be reported to the provider promptly. Choice A, 'Blood urea nitrogen (BUN) 15 mg/dL,' is within the normal range (7-20 mg/dL) and does not indicate acute kidney injury. Choice B, 'Urine output of 45 mL/hr,' is a low urine output but does not directly reflect kidney function decline. Choice D, 'Calcium 9 mg/dL,' is within the normal calcium range (8.5-10.5 mg/dL) and is not specifically indicative of acute kidney injury.

Correct Answer: A

Rationale: A heart rate of 78/min is within the normal range; however, postoperative patients require close monitoring for any signs of complications. While the heart rate is normal, other critical findings such as increased pain, excessive bleeding, or other concerning symptoms may need immediate attention. Choices B, C, and D all indicate normal postoperative vital signs and oxygen saturation levels, which do not raise immediate concerns requiring reporting to the provider.