In general, the most materially advanced and developed countries are focused on extensive development of the quaternary sector of their economy. the correct option in respect to the given question is option "D". Quaternary sector is the sector that deals with knowledge based economy. This kind of sector includes the information technology sector, blogging, education, financial planning etc. This sector is not only based on knowledge but also on specialized skills. Organizations of this modern era investing heavily in the quaternary sector for further expansion.
