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The following is most likely to develop individual characteristics when it is used a lot :

  • A.Typewriting
  • B.Ink jet printing
  • C.Dot matrix printing
  • D.Laser jet printing

Answer: A

Typewriting is most likely to develop individual characteristics when it is used a lot. The type faces of a typewriter wear, bend and get out of alignment with use, so each machine produces its own defects that can be matched with a document. Ink jet, dot matrix and laser jet printers have less of this wear from use in the printed characters. So A is correct. A typewriter has a fixed type face for each letter, and with long use these faces wear, get dirty or are damaged, and the alignment of the letters on the line changes. These defects are repeated on every page the machine types and so serve as the individual characteristics by which a document may be tied to one typewriter.

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