Final answer:
The recommended maximum number of outlets for a lighting branch circuit according to EWR is 10, to prevent circuit overloading and maintain safe operation.
Step-by-step explanation:
According to the specifications provided in the hypothetical EWR (which seems to be a reference to electrical wiring regulations), the recommended maximum number of outlets that are to be connected to any one lighting branch circuit is 10. Therefore, the correct option is b. 10.
This recommendation helps to prevent overloading circuits and ensures that the electrical system functions safely and efficiently.