As the Third Millennium Dawns, There Are Reasons for Both

As the third millennium dawns, there are reasons for both optimistic and pessimistic outlooks. A pessimist might argue all of the following except that

A) AIDS has become a global epidemic, especially devastating in Africa
B) The growth of European population might overstrain the resources of the Earth
C) There are still no clear solutions for the problems of pollution
D) The "ozone holes" in the Arctic and the Antarctic might grow