A female client assigned to a mental health unit visits with her significant other during the evening. After the significant other leaves, the nurse notices that the client is more isolative and refuses to attend the evening group. Which response by the nurse is most therapeutic?

Choice A reason:Hand hygiene is the foundation of Standard Precautions and the single most effective action to prevent transmission of infectious agents. Performing handwashing or using an alcohol‑based hand rub immediately before preparing or administering an injection removes transient microorganisms acquired from touching surfaces and protects both the client and the environment from contamination

Choice B reason:While wearing gloves during handling and disposal of contaminated sharps is recommended whenever there is potential contact with blood or body fluids, it is a secondary barrier. Reliance on gloves alone is insufficient because gloves can have micro‑perforations and are removed after use, making hand hygiene before and after glove use the priority

Choice C reason: Donning a face mask before administering the medication is not a necessary action to indicate an understanding of standard precautions. A face mask is only required when there is a risk of droplet transmission of infectious agents, such as when caring for a client with respiratory infections. It is not needed for self-administration of medications, unless the medication is aerosolized or nebulized.

Choice D reason: Removing the needle before discarding used syringes is not a safe action to indicate an understanding of standard precautions. It increases the risk of needle-stick injuries and contamination. The needle and syringe should be disposed of as a single unit in a puncture-resistant container.

Choice A reason: This is the most important intervention because a high serum potassium level can cause cardiac dysrhythmias, which can be life-threatening. The nurse should monitor the client's heart rate and rhythm closely and report any changes or abnormalities to the healthcare provider.

Choice B reason: This is not the most important intervention because the color and amount of urine are not directly related to the serum potassium level. The nurse should assess the client's renal function and fluid balance, but these are not the priority assessments.

Choice C reason: This is also not the most important intervention because the muscle strength is not the most sensitive indicator of the serum potassium level. The nurse should evaluate the client's neuromuscular status and watch for signs of weakness or paralysis, but these are not the priority assessments.

Choice D reason: This is another incorrect intervention because the deep tendon reflexes are not the most reliable indicator of the serum potassium level. The nurse should check the client's reflexes and note any hyperreflexia or hyporeflexia, but these are not the priority assessments.