According to the passage, today’s successful firms,unlike successful firms in the past, ma

y earn the greatest profits by______

A．investing in research to produce cheaper versions of existing technology

B．being the first to market a competing technology

C．adapting rapidly to a technological standard previously set by a competing firm

D．establishing technological leadership in order to shape product definitions in advance of competing firms

E．emphasizing the development of methods for the mass production and distribution of a new technology.