Final answer:
The immediate nursing care after a sexual assault should prioritize obtaining the assault history from the client, ensuring their safety, and providing emotional support before other procedural steps.
Step-by-step explanation:
The question pertains to the immediate nursing care that should be provided after a sexual assault. Among the options provided, obtaining the assault history from the client (Option A) is an important part of the initial response. It allows for the medical professionals to understand the context of the assault, which may guide medical and forensic examination, and ensures that the care provided is informed and sensitive to the client's needs. While preserving evidence and possibly involving the police are important steps, the well-being and choices of the client take precedence following such a traumatic event. Thus, the priority upon immediate care is to ensure the client's safety, provide emotional support, and address medical concerns before taking legal or additional procedural steps.