3. How does paragraph 3 contribute to the development of ideas in
the text?
A. It shows how the brains selected for the study might not have been typical
examples of a football player's brain.
B. It reveals that scientists only selected brains from players who had been
showing signs of CTE before they died.
C. It questions whether or not the study was conducted in a fair fashion, and
whether the results should be trusted.
D. It emphasizes that the selection of the brains for the study was done at random
so as to not influence the results in any way.