video1.0<iframe src="https://www.loom.com/embed/166f78061e024d6a81e17d11addc75d3" frameborder="0" width="962" height="721" webkitallowfullscreen mozallowfullscreen allowfullscreen></iframe>721962Loomhttps://www.loom.com721962https://cdn.loom.com/sessions/thumbnails/166f78061e024d6a81e17d11addc75d3-00001.jpg215p: In context, which choice best combines the underlined sentences? a: Aside from lowering worker productivity, artificial light sources are also costly, typically constituting anywhere from 25 to 50 percent of a building’s energy use. ; The cost of artificial light sources, aside from lowering worker productivity, typically constitutes anywhere from 25 to 50 percent of a building’s energy use. ; Typically constituting 25 to 50 percent of a building’s energy use, artificial light sources lower worker productivity and are costly. ; Artificial lights, which lower worker productivity and are costly, typically constitute anywhere from 25 to 50 percent of a building’s energy use. ;