When the FBI Investigates Crimes with DNA Evidence,they Compare 13

When the FBI investigates crimes with DNA evidence,they compare 13 different noncoding regions of the human genome between the DNA evidence and the suspect.Why is it important to look at so many regions?

A) Repeating the test in different areas of the DNA ensures that the investigator did not make any mistakes in determining the DNA sequence.
B) Most regions of the human genome are identical, so you have to look in many locations to make sure you find a region that shows differences.
C) The more regions of the DNA you examine, the less likely you are to run into a coincidental similarity between DNA sequences.
D) Restriction enzymes only work in these 13 regions of the human genome.