Mrs. Jefferson did a survey about dangerous environmental problems with 100 students at her school. The graph shows the results:

According to the graph, ----.



Which of the following completes the sentence above?

A) Water pollution affects environment more than the others.
B) Air pollution and deforestation have the same effect on the environment.
C) Increasing temperature of the world is the most dangerous problem for the environment.
D) They think water pollution doesn’t give harm to the environment.