You are examining balance sheets for 2012 and 2013 and you observe that a company's net fixed assets increased from $45 million to $50 million. The income statement states that depreciation was $2 million. If it's the case that the company purchased a total of $10 million in fixed assets during the year, how much must they have sold?
A) $3 million
B) $0
C) $10 million
D) $5 million
E) Cannot be determined