Answer:
C. To define the purpose and limits of a Big Year
Explanation:
Since this article isn't separated into clear paragraphs, I will use the article in the attachment to answer this.
Third paragraps is the one starting with "A "Big Year" is a year..." and ending with "...off the Canadian coast."
Basic pieces of information this paragraph provides are brief introduction to what "Big Year" actually is and roughly explained limits of the region where this contest takes place in North America.
Having this in mind, the best fitting answer would be C.
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