Researchers are trying to find early biomarkers associated with neurodegenerative disorders because _____.
a. the biomarkers produce beta-amyloid, which can clean plaque from the brain
b. they have the tools now to stop the diseases if they can find the right biomarkers
c. by the time symptoms appear, there has already been significant cell death and brain damage
d. they want to test their theory that removing the biomarkers will prevent the diseases
Answer: c. by the time symptoms appear, there has already been significant cell death and brain damage
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What will be an ideal response?