Use the sentence to answer the question.
Chesa writing an essay for science class about her local water treatment plant. Her essay explains how the plant uses different processes to filter out pollution and other particles from the water supply. Her essay relies on her Libra research as well as interviews from plant workers as examples.
What is Chesa's purpose for writing the essay?
A. To present her audience to stop drinking the local water
B. To present opposing viewpoints about how local water should be treated
C. To inform her audience about how the local water is treated
D. To entertain her audience with personal interviews with local community members