What Method Is Used to Read a Bar Code

Multiple Choice

What method is used to read a bar code?

A) The magnetic bar codes are converted by a bar code reader into a form that a computer can process.
B) A laser translates the bars on the bar code into digital signals that are stored in RAM.
C) A laser scanner produces light beams that pass through a scanner filter which then translates the light patterns into digital patterns that can be interpreted by the CPU.
D) A bar code reader uses laser beams to read bar codes.