Describe the three techniques most frequently used for automatic tracking of production parts and materials (Select the three best answers from the choices given below.) audio-frequency lure generation when exiting work well  bar code reading with hand-held and fixed station scammers\'  binary code pattern generation on production pallets  radioactive isotope  tracing with Geiger counters  radio-frequency tags using electric circuits to transmit a code  vision systems with miniature camera  production pallets
Answers are as follows:
 B. Bar code reading with hand-held and fixed station scanners.
 C. Binary code pattern generation on production pallets.
 E. Radio-frequency tags using electric circuits to transmit a code.