Biologist Dr. Amy Park argues that microbes in the human gut significantly influence mental health through the gut-brain axis.
10
readingWhich medical study would best support Park's gut-brain connection claim?
A
The gut contains many bacteria
B
Gut health affects digestion
C
Patients given probiotics showed 30% reduction in anxiety and depression symptoms; germ-free mice developed anxiety that was reversed when normal gut bacteria were restored
D
Researchers study microbiomes
Correct Answer: C
Choice C is the best answer. Human + animal evidence with intervention proving causation supports the connection.
💡 Strategy: Biological connection claims need intervention studies proving causation.