29 Forensic science plays an important role in the investigation of serious crimes. One of the first significant
achievements in the field was the development of techniques for identifying individuals by their ______. In the 19th
century, it was discovered that almost any contact between a finger and a fixed surface left a latent mark that could
be made visible by a variety of procedures.
(A)blood (B)saliva (C)semen (D) fingerprints