Consider the figure below showing calculated sustainable yield for Peruvian anchovy. 
For years Peruvian anchovy were fished at their estimated sustainable yield. Which of the following is the BEST explanation for why the population crashed?
Definitions:
Global Market
An international economic environment where businesses compete across borders, offering products and services to a worldwide audience.
Poor Writing
Writing that fails to effectively convey its intended message or purpose due to errors in grammar, structure, clarity, or coherence.
Problems
Issues or obstacles that require solutions or management.
PAIBOC
An acronym for Purpose, Audience, Information, Benefits, Objections, and Context, a framework for planning communication strategies.
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