Final answer:
The most effective nursing intervention for helping a withdrawn client develop relationship skills is likely to be Option A, which is offering the client frequent opportunities to interact with one person, building trust and social competence gradually.
Step-by-step explanation:
In considering which nursing intervention will be most effective in helping a withdrawn client develop relationship skills, it's essential to analyze options that promote engagement and incremental social interaction. Confronting the withdrawn behavior too directly or placing the individual in large social settings might be overwhelming. Therefore, Option A, to offer the client frequent opportunities to interact with 1 person, can be most effective as it allows the individual to develop trust and build relationship skills in a safe, controlled, and supportive environment. Eventually, as the individual feels more comfortable, this could lead to interactions within larger social skills groups.
Other supporting interventions could involve applied behavior analysis (ABA), which can help to understand the underlying causes of withdrawal and to develop targeted strategies for social interaction. Social communication groups and occupational therapy are additional resources that might be woven into the care plan as the client shows readiness for more diverse social engagements.