Statement:
Whenever there are special events or celebrations magazines publish special supplements covering the occasions; readers must reserve their copies of such supplements much in advance.
Conclusions:
I. Special supplements give every good coverage to the event concerned.
II. These special supplements are very much in demand.
Answer: D
The statement tells us that magazines publish special supplements whenever there are special events / celebrations and that readers should reserve their copies in advance. This tells us that these supplements have a huge demand in the market which could be ascribed to their covering the event every exhaustively. This is exactly what conclusions I and II state, hence both follow.