What does the last sentence of paragraph 1 mean?

Question:

What does the last sentence of paragraph 1 mean?

• A.
  The experts did not believe that there would be any more changes in the next century.
• B.
  The experts were certain that people would not believe in the changes in the next century.
• C.
  It was believed that more and more changes would be seen in the next century.
• D.
  It was predicted that the changes in the next century would be beyond people’s imagination.