问题详情

According to the passage, today’s successful firms,unlike successful firms in the past, may 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.请帮忙给出正确答案和分析，谢谢！