Question

how did the uniqueness of each persons dna help in the brown case?
investigators were able to use the dna samples on the victims clothing to differentiate the dna belonging to the victim, brown, and the real criminal.
investigators were able to use the dna samples to identify the victim and notify her family.
investigators used the dna samples on the train to identify barry benchs remains after the train accident.
dna from the burned building linked both roy brown and barry bench to the scene of the crime.
dna evidence proved that the 7-year-old girl really was roy browns daughter.

Explanation:

The Brown case (Roy Brown) involved wrongful conviction; DNA testing later differentiated the victim's DNA, Brown's DNA, and the real perpetrator's DNA from evidence on the victim's clothing, leading to Brown's exoneration. This directly leverages DNA uniqueness to distinguish individuals. Other options do not align with the case's key use of DNA differentiation.

Answer:

A. investigators were able to use the DNA samples on the victim's clothing to differentiate the DNA belonging to the victim, Brown, and the real criminal.