According to NEC 210.70(A)(3), where must at least one lighting outlet be installed?

The correct choice is the attic, as per NEC 210.70(A)(3), which specifies the requirement for at least one lighting outlet to be installed in attics that are accessed for purposes such as maintenance or inspection. This requirement is in place to provide safe visibility and reduce the risk of accidents when someone is working in the attic space.

The NEC (National Electrical Code) prioritizes safety and accessibility in residential wiring. Given that attics can have limited natural light and can be full of obstacles, having a designated lighting outlet ensures that anyone entering can adequately see their surroundings, thereby reducing the risk of tripping or encountering hazards.

When considering the other options, while garages, basements, and laundry rooms all have specific lighting requirements in various contexts, the particular reference in NEC 210.70(A)(3) specifically highlights the necessity of providing a lighting outlet in the attic for safety and operational effectiveness. This is why it stands out as the appropriate answer in this case.