The 2010 and 2012 market share data of three competitors (Alston, Baren, and Clemson) in an oligopolistic industry are presented in the following pie charts. 
Which of the following is true?
Definitions:
Labor
The human effort, either physical or mental, that is used in the production of goods and services.
MRP
Marginal Revenue Product, the additional revenue generated by employing one more unit of a resource, such as labor or capital.
Capital
Financial assets or the financial value of assets, such as funds held in deposit accounts, as well as the physical factors of production including machinery, buildings, and land.
Labor
The body of persons engaged in physical or mental work, especially to produce goods or provide services for wages.
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