Final answer:
The nurse should include the instruction to implement strict routines, encourage the use of visual aids, and provide limited choices in home care for a child with autism spectrum disorder. Therefore, the correct option is a.
Step-by-step explanation:
The nurse should include the instruction to implement strict routines to avoid any changes in the home care of a child with autism spectrum disorder. Routines and predictability are important for individuals with autism as they provide a sense of security and help reduce anxiety. Visual aids can also be helpful in providing structure and promoting communication, so the nurse should encourage the use of visual aids. However, exposure to unpredictable situations should be avoided as it can be overwhelming for individuals with autism. Lastly, providing limited choices can promote decision-making skills and empower the child.