Figure 42.3 Use the Graph in Figure 43.3 and the Information Provided

Figure 42.3
Use the graph in Figure 43.3 and the information provided in the paragraph below to answer the following questions.
Flycatcher birds that migrate from Africa to Europe feed their nestlings a diet that is almost exclusively moth caterpillars.The graph in Figure 43.3 shows the mean (peak) dates of bird arrival,bird hatching,and caterpillar season for the years 1980 and 2000.
-The shift in the peak of caterpillar season between 1980 and 2000 is most likely due to

A) pesticide use in the area.
B) earlier flycatcher migration.
C) global climate change.
D) acid precipitation in Europe.