Neuroscientist Dr. Sarah Kim argues that the human brain can generate new neurons throughout life, contradicting the long-held view that adult brains only lose neurons.
5
readingWhich research finding would best support Kim's paradigm-shifting claim?
A
Brain injuries can sometimes heal
B
Memory can improve with training
C
Researchers found newly-formed neurons in the hippocampus of 79-year-old deceased subjects, with carbon dating confirming these cells were less than 5 years old at time of death
D
Some animals can regenerate brain tissue
Correct Answer: C
Choice C is the best answer. Direct evidence of new neurons in elderly humans + scientific dating proof.
- Context clues: Kim claims adult brains generate new neurons.
- Evidence evaluation: New neurons in 79-year-olds + carbon dating (<5 years old) proves ongoing generation.
- Verify: This directly contradicts "only lose neurons" dogma with age-verified evidence.
💡 Strategy: Paradigm-challenging claims need rigorous, verifiable scientific evidence.