The author probably uses bulleted lists to

a. copy the format of the nga report

b. show opposing viewpoints

c. make information easier to read

d. provide sources for statistics

C

Explanation:

In this case, the author is--for the most part--using statistics to argue their claim. Bullet points are used to make the information easier to read, they allow the audience to comprehend the findings of the NGA report with clarity.

Although A is a possible reason for the bulleted list, this is only a guess, and isn't actually specified in the document.

The information in the bulleted points follow the author's claim that schools should continue to fund art programs. They are not opposing viewpoints.

The source of the statistics stated in the bulleted points are cited by the author at the paragraphs preceding them.