The Graph Below Is of an Index of Diversity of Arthropods

Multiple Choice

The graph below is of an index of diversity of arthropods in three different plots of a cornfield. In one of the three plots an insecticide was sprayed. Answer the questions below about this situation.
Arthropod diversity in three cornfield plots.
-Which of the following conclusions is supported by the data shown in the graph?

A) Some species were disappearing as others were appearing.
B) There were more individual arthropods in each of the plots in July than in any other month.
C) In general, species diversity for all three plots taken together was greatest in July.
D) In August, Plot 2 had the greatest species diversity.