Question

which of the following pieces of physical evidence was discovered as a mark of identification during the 1800s?
dna testing
fingerprinting
lie - detector test
eyewitness ids

Explanation:

Fingerprinting was discovered as a mark of identification in the 1800s. DNA testing emerged much later. Lie - detector tests measure physiological responses rather than being a physical mark of identification. Eyewitness IDs are not physical evidence for identification in the same sense as fingerprints.

Answer:

B. Fingerprinting