SAT English Practice Question

The study of the effects of prolonged exposure to artificial light on the human circadian rhythm is a relatively new field, however, the results of these studies have already yielded interesting insights into the potential impact of artificial light on human health.

1. A.The study of the effects of prolonged exposure to artificial light on the human circadian rhythm is a relatively new field, however, the results of these studies have already yielded interesting insights into the potential impact of artificial light on human health.
2. B.The study of the effects of prolonged exposure to artificial light on the human circadian rhythm is a relatively new field, however, the results of these studies have already yielded interesting insights into the potential impact of artificial light on human health.
3. C.The study of the effects of prolonged exposure to artificial light on the human circadian rhythm is a relatively new field, however, the results of these studies already yielded interesting insights into the potential impact of artificial light on human health.
4. D.The study of the effects of prolonged exposure to artificial light on the human circadian rhythm is a relatively new field, however, the results of these studies are already yielding interesting insights into the potential impact of artificial light on human health.