When a machine analyses the frequencies used by a particular voice and draws a graph of them, sound is electronically _________ into a pattern of lines.

A．cutting down cost of sales
B．speeding distribution of commodities
C．increasing productivity of the companies
D．changing the structure of the companies

A．reevaluate their business plan
B．apply old strategies
C．become e-businesses
D．re-evaluate their business patterns and apply new strategies