Correct Answer: A

Rationale: The correct answer is A: A 79-year-old malnourished client on bed rest. This client is at the highest risk for developing decubitus ulcers due to poor nutrition and immobility. Malnutrition can impair tissue healing and increase susceptibility to skin breakdown, while prolonged bed rest can lead to pressure ulcers. Choice B is incorrect because obesity can cushion pressure points and reduce the risk of pressure ulcers. Choice C is incorrect as incontinence predisposes to moisture-associated skin damage rather than pressure ulcers. Choice D is incorrect as an ambulatory client is less likely to develop pressure ulcers compared to bedridden clients.

Correct Answer: A

Rationale: The most important instruction for a 65-year-old female client diagnosed with osteoporosis regarding exercise is to engage in weight-bearing activities. Weight-bearing exercises are crucial in maintaining bone density and preventing osteoporosis-related fractures. Choice B is incorrect because the primary focus should be on bone health rather than weight reduction. Choice C is incorrect as avoiding all exercise activities that increase the risk of fracture would limit physical activity, which is essential for overall health. Choice D is incorrect as while strengthening muscles is beneficial, weight-bearing activities directly impact bone health in osteoporosis.

Correct Answer: A

Rationale: The correct answer is A: Hypokalemia increases the risk of dysrhythmias when taking digoxin, making potassium intake crucial. Digoxin toxicity is more likely in patients with low potassium levels, leading to an increased risk of dysrhythmias. Choices B, C, and D are incorrect because hypokalemia in combination with digoxin is primarily associated with dysrhythmias rather than oliguria, irritability, anxiety, or alteration of consciousness.

Correct Answer: B

Rationale: The correct answer is B. When discussing infant feeding skills, it is important to note that eating foods higher in fat is not considered a specific feeding skill for newborns. The typical progression of feeding skills includes pushing solid objects from the mouth, eating pieces of soft, cooked food, drinking from a cup held by another person, and experimenting with a spoon. Choices A, C, and D correspond to the expected developmental sequence of feeding skills for infants, making them incorrect answers in this context.

Correct Answer: D

Rationale: Assisting with oral hygiene is the essential initial step before collecting a sputum specimen for acid-fast bacillus (AFB) to prevent contamination of the sample. Ensuring the client's mouth is clean reduces the risk of introducing unwanted bacteria into the specimen. Asking the client to cough sputum into a container, having the client take deep breaths, and providing a specimen container are important steps in the specimen collection process, but they should follow ensuring proper oral hygiene.