Which forensic tests increase the accuracy and reliability of evidence?

The forensic test that I think increases the accuracy and reliability of evidence is the analysis of DNA. This testing uses rigorous scientific experimentation and validation. To use DNA an investigator takes a sample of DNA such as dried blood or semen from the scene

The first answer is b. then the second one is a

Answer   (1) u.s.coast guard                (2)president major disaster declaration                (3) 72 hours;                 (4) u.s coast guard auxiliary;