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.
B) 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.
C) Typically constituting 25 to 50 percent of a
building’s energy use, artificial light sources
lower worker productivity and are costly.
D) Artificial lights, which lower worker productivity
and are costly, typically constitute anywhere
from 25 to 50 percent of a building’s energy use

Respuesta :

Aside from lowering worker productivity, artificial light sources are also costly, typically constituting anywhere from 25 to 50 per cent of a building’s energy use.

What are Artificial light sources?

In the late 19th and early 20th centuries, electric energy sources were used to generate artificial lighting. The goal of technological development for artificial lighting is to create light that will approximate natural sunshine (sunlight). The frequency range of an artificial light source and the intensity of illumination, expressed in lumens, are the two metrics used to measure artificial light. According to its progressive generation and the technology that made it possible, artificial light can be divided into three main sources.

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