Neuroscientist Dr. David Chen argues that childhood trauma causes lasting biological changes that increase vulnerability to mental illness decades later.
4
readingWhich biological study would best support Chen's long-term impact claim?
A
Adults who experienced childhood trauma showed 30% higher cortisol responses to stress, epigenetic changes in stress genes, and 200% higher rates of depression—changes traceable directly to childhood events via longitudinal tracking
B
Childhood is formative
C
Trauma therapies exist
D
Some children experience adversity
Correct Answer: A
Choice A is the best answer. Biological markers + disease rates + longitudinal tracking proves causal link.
đź’ˇ Strategy: Long-term biological claims need tracked changes from exposure to outcome.