A. Full disclosure deters malpractice suits and negligence claims: While full disclosure of medical options and information is important for ethical and legal reasons, the primary purpose is not solely to deter malpractice suits or negligence claims. Full disclosure is a fundamental aspect of patient-centered care and respects the patient's right to autonomy and informed decision-making.

B. Empowerment has a positive effect on health status: This choice is correct. Empowerment involves providing individuals with the knowledge, skills, and resources they need to make informed decisions about their health. Research has shown that empowering patients to participate actively in their healthcare decisions leads to better health outcomes and overall well-being.

C. The activity theory of aging requires maintenance of lifestyle: The activity theory of aging suggests that older adults should remain active and engaged in activities to maintain a sense of fulfillment and well-being. While staying active is important for healthy aging, it is not directly related to the concept of providing information to older adult clients to empower them in decision-making.

D. Information is an effective strategy for stress management: While providing information and education can certainly help individuals manage stress by promoting a sense of control and understanding, this choice does not directly address the concept of empowering older adult clients to make informed decisions about their care.