Instructions: Study the graph of the following times and answer the following question:Books (from thousands of C1, C2, C3, C4 and C5) of a publishing company in two consecutive years of 2010 and 2011) Sales. What is the ratio of the total sales of branch C2 during the two years and the total sales of branch C4 during the two years?

• A. 171 : 139
• B. 183 : 169
• C. 139 : 171
• D. 169 : 183