A recent dietary survey found that individuals who regularly consume fermented foods, such as yogurt and kimchi, report significantly lower levels of daily stress than those who rarely eat such foods. Based on this correlation, nutrition researchers concluded that the specific probiotics prevalent in fermented foods actively reduce the body's physiological stress response.
Which of the following, if true, most strengthens the researchers' argument?
- In a subsequent controlled trial, individuals randomly assigned to consume fermented foods daily showed a substantial decrease in blood cortisol, a primary stress hormone.Cevap
- BPeople who experience high levels of chronic stress often lack the free time and energy required to prepare or seek out fermented foods.
- CAmong individuals who consume fermented foods regularly, those who eat the greatest variety of such foods report the lowest levels of daily stress.
- DThe people in the dietary survey who rarely ate fermented foods consumed a higher total number of calories than those who ate them regularly.
- EThe percentage of the population consuming fermented foods has steadily increased over the last year, even though the absolute number of stress-related medical visits has not.
Cevap
The statement detailing a controlled trial where randomly assigned consumption of fermented foods led to a decrease in blood cortisol.
The correct answer strengthens the conclusion by shifting from observational survey data to a controlled experimental trial. By randomly assigning the diet and showing a measurable physiological result (decreased blood cortisol), it establishes a clear timeline and eliminates alternative lifestyle factors, directly supporting the claim that probiotics actively cause a reduction in stress.
Adım Adım Çözüm
Anahtar Kavram
Strengthening Causal Arguments (Ruling Out Alternatives / Confirming Mechanism)
Tahmini Süre:1m 30s