Multiple choice

______ is the basis of all document-copying machines.

  1. Xerography

  2. Photography

  3. Telegraph

  4. X-Ray

Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Xerography, invented by Chester Carlson in 1938, is the dry photocopying process that forms the basis of modern document copying machines. It uses electrostatic charges to transfer toner onto paper, revolutionizing office reproduction.