15. Which of the following best explains the research finding about sleep disorders mentioned in sentence 13?
Answer: B
They may result from enforcing an unnatural sleep rhythm
Research findings suggest that modern sleep disorders, such as insomnia, might be a consequence of imposing a sleep pattern that goes against the natural rhythms of human sleep. This insight indicates that the enforced consolidation of sleep into a single block could be detrimental to individuals' ability to sleep well.
A) They are caused by modern technology
While modern technology can contribute to sleep disturbances, this option does not accurately reflect the findings presented in the extract. The research emphasizes that sleep disorders may stem from unnatural sleep patterns rather than solely from technological influences.
B) They may result from enforcing an unnatural sleep rhythm
This option directly aligns with the extract's assertion that modern sleep disorders could be related to the expectation of continuous, uninterrupted sleep. The study indicates that natural sleep may involve segmented periods, and enforcing a single block of sleep could lead to difficulties like insomnia.
C) They are linked to stress from city life
Although stress from city life could affect sleep quality, the extract does not indicate that this is the primary cause of modern sleep disorders. Instead, it focuses on how unnatural sleep rhythms are more directly related to the issues individuals face when trying to sleep.
D) They are unrelated to historical sleep patterns
This statement contradicts the evidence presented in the extract. Historical references to 'first sleep' and 'second sleep' suggest that human sleep patterns have evolved, and modern sleep disorders may actually be connected to the departure from these historical patterns.
Conclusion
The correct answer, option B, is supported by the findings in the extract, which argue that imposing a single, uninterrupted sleep period may conflict with natural sleep behaviors, leading to disorders like insomnia. The other options do not accurately capture the essence of the research findings, which focus on the impact of enforced sleep rhythms on sleep quality.