Sentences of a paragraph are given below in jumbled order. Arrange the sentences in the right order to form a meaningful and coherent paragraph.
A. Earlier, they had to look through hundreds of mugshots in large books and they could make a positive identification only in 5% of the cases.
B. This saves a lot of time and effort and also leads to more positive identifications.
C. Now computers make this easier for witnesses by projecting only pictures that match the descriptions closely.
D. After a crime, witnesses often give the police a description and thus help to identify the criminal.