Ramos Company Included the Following Information in Its Annual Report

Ramos Company included the following information in its annual report:
$\begin{array}{|l|l|l|l|}\hline & 2011 & 2010 & 2009 \\\hline \text { Sales } & \$ 178,400 & \$ 162,500 & \$ 155,500 \\\hline\text { Cost of goods sold } & 115,000 & 102,500 & 100,000 \\\hline\text { Operating expenses } & 50,000 & 50,000 & 45,000 \\\hline\text { Net incoume } & 13,400 & 10,000 & 10,500 \\\hline \end{array}$
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Refer to the information for Ramos Company. In a common size income statement for 2011, the operating expenses are expressed as:

A) 30.3%
B) 28.0%
C) 43.8%
D) 100%