【单选题】In criminal cases,the availability of readable fingerprints is often critical in establishing evidence of a major crime.It is necessary,therefore,to follow proper procedures when taking fingerprints. ...
A.
no crimes can be solved without readable fingerprints.
B.
all persons who have touched an area in a crime scene are suspects.
C.
all fingerprints found at a crime scene are used in court as evidence.
D.
all persons who have touched a crimescene area should be fingerprinted.