Answer:
A. Kim looks at her neighbors' houses.
Explanation:
According to the given narrative, Kim's living room was dark as she entered the house and even when she flipped the switch, nothing happened.
She glanced outside and noticed that other houses were dark.
From this given narrative, the explicit detail that best supports the inference that the electricity is off is option A.
This is because as her light didn't come on when she flipped the switch, it could have been an electrical fault or from the bulb but when she looked out and other houses were dark, that proved that the electricity was off.