A firm has the following sales figures: Year 2011: $2.1 million. Year 2012: $2.3 million. Year 2013 $2.5 million. Year 2014 $2.2 million. Year 2015 $3.1 million. Using the naive approach, determine the forecast for next year's sales. A. $3.2 million. B. $3.1 million. C. $3.4 million. D. $2.5 million