【正确答案】 D

【答案解析】From 2007 to 2008, the profits increased by 3%; from 2008 to 2009, the profits increased by 5%. If the profit in 2007 was 100, then in 2008 it was 103 and in 2009 it was 103×1.05=108.15. This is equivalent to an overall increase of 8.15%.