According to Feature L02: Visual Lighting Design, part 1 of the WELL Core requirements, the project team must provide appropriate illuminances on work planes for regular users of all age groups, as required for the tasks performed in the space1. One of the options to meet this requirement is to ensure that at least 90% of the interior project area is comprised of the following space types and meets the associated illuminance thresholds:
Room Types Minimum Illuminance Threshold Offices Classrooms 30 fc (320 lux) at task surface1. Therefore, option D is the correct answer, as it meets the minimum illuminance threshold for office areas.
References: = Standard | WELL V2