The underlined word "heed" in the last but one sentence of the passage means ______

A．What can nature contribute to technology
B．Environment can sometimes block the progress of technology.
C．Technologies of all kinds should serve the natural environment.
D．Environment deserves the most attention in the development of technologies.

A．received great attention from the governments
B．caused some serious disorders in technology and economy
C．affected modem technologies more directly than before
D．become more important but received less and less attention