Discussion
The angle of tool application should be considered for making standard tool marks by :
Answer: C
The angle of application of the tool should be considered for making standard tool marks with a screwdriver, option C. A screwdriver leaves a mark that depends strongly on the angle at which the blade is held against the surface, so test marks must be made at a number of angles to be compared with the questioned mark. A hammer (A) leaves an impression of its face, pliers (B) leave marks of the jaws and a prybar (D) leaves a mark of its blade; the key treats the angle of application as essential for the screwdriver.
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