With the development of technology, the role of a teacher in the future will be

With technology's growth the future teacher's role will chiefly be to guide students.

Providing information (A) is increasingly done by technology itself.

Developing new textbooks (B) is a specialised task, not the teacher's central future role.

Using the Internet in teaching (D) is a tool, a means, not the essential role.

The teacher shifts from information-giver to facilitator, mentor and guide of learning.

This reflects the guide on the side replacing the sage on the stage.